To truly understand why some are blessed to be chosen as leaders in God's church and some are born to never hear the gospel in their life one must understand the premortal existence of mankind and the doctrine of salvation for the dead.
For God to give all mankind the opportunity of hearing and accepting the gospel, they all must hear the gospel and decide whether or not to accept it. However, in this life we know that there have been many who have come and died without having the chance to hear and receive the gospel of Jesus Christ. But Christ did not only come to the living on this earth to preach his gospel but he also went unto those who are spirits who have died and didn't have a chance to hear the gospel while alive on earth.
1 Peter 3:18-20
18 For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit:
19 By which also he went and preached unto the spirits in prison;
20 Which sometime were disobedient, when once the longsuffering of God waited in the days of Noah, while the ark was a preparing, wherein few, that is, eight souls were saved by water.
Here we learn that Jesus, upon his death, went and preached to "the spirits in prison". They were they who died and were in the world of spirits. He was teaching unto them because many did not have the opportunity to hear the gospel and needed the chance to hear it and accept it.
1 Peter 4:6
5 Who shall give account to him that is ready to judge the quick and the dead.
6 For for this cause was the gospel preached also to them that are dead, that they might be judged according to men in the flesh, but live according to God in the spirit.
Here we are taught that the gospel was preached also to them that are dead. Jesus has made it possible that all mankind who come to this earth will have the opportunity before the day of judgement to hear and accept his gospel. All mankind will have the opportunity to choose salvation.
What many fail to understand is that before we came to this earth, we existed as the spirit children of our Father in Heaven. When Jesus created the earth, we were there in heaven shouting for joy.
Job 38:3-7
3 Gird up now thy loins like a man; for I will demand of thee, and answer thou me.
4 Where wast thou when I laid the foundations of the earth? declare, if thou hast understanding.
5 Who hath laid the measures thereof, if thou knowest? or who hath stretched the line upon it?
6 Whereupon are the foundations thereof fastened? or who laid the corner stone thereof;
7 When the morning stars sang together, and all the sons of God shouted for joy?
To the prophet Jeremiah, the Lord said:
Jeremiah 1:4-5
4 Then the word of the Lord came unto me, saying,
5 Before I formed thee in the belly I knew thee; and before thou camest forth out of the womb I sanctified thee, and I ordained thee a prophet unto the nations.
As the spirit children of God the Father, we all existed prior to coming to this earth. We at that time had our free will to choose also. One of the children of God, named Lucifer, who was a son of the morning or morning star, rebelled against the Father and sought to usurp the power of God. In his rebellion he got many of the children of God to follow after him and his false plan for mankind. As premortal spirits of our heavenly Father, we all had to choose to either follow after Lucifer or follower the plan of our Father in heaven. Those who sided with Lucifer were all cast out of heaven into this earth and lost the opportunity of coming to this life and gaining a body of flesh and bone. There were likely varying degrees of allegiance of the followers of God and his Christ. But those who eventually sided with the Father were allowed to come to this earth and receive a body of flesh and bones and go through a mortal probation. We read about this in Revelation 12.
Revelation 12:7-11
7 And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels,
8 And prevailed not; neither was their place found any more in heaven.
9 And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.
10 And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night.
11 And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death.
Those who were on the side of God the Father, Jesus Christ, and Michael, according to verse 11, needed to overcome Satan by the blood of the Lamb. In other words, those of us who fought on God's side needed the blood of the Lamb to overcome him. This means that we all came to this earth and received bodies of flesh and bone and were in need of repentance (as fallen men) to overcome Satan. Thus we fought in heaven and came to this earth to finish the battle. Verse 11 also declares that we were subject to death.
Some of the most valiant of those who fought against Satan in the premortal existence were blessed in this life to be foreordained to be rulers in God's kingdom.
Ephesians 1:3-5
3 Blessed be the God and Father of our Lord Jesus Christ, who hath blessed us with all spiritual blessings in heavenly places in Christ:
4 According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love:
5 Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,
So basically, those in the premortal existence who were very, very valiant and loved God and his plan, likely have a predisposition to hearing and understanding the call to righteousness and free will when we hear it in this life. Thus they tend to choose to believe in Jesus Christ and want to follow his ways. However, there are those who have varying dispositions that come to this life who did eventually side with the Father and the Son in the war in heaven. For some it comes easier than to others. Our mission is to try and convince all mankind of what they chose in the premortal life to come unto Christ and find life eternal. God wishes for all his children to choose good over evil but knows that for us to truly be good beings, we must make this decision in and of ourselves. You only become truly good beings in and of yourselves by choose in and of yourself to be such. Thus this life is a test to see if we will choose in and of ourselves to good beings and love righteousness over wickedness. God wants all mankind to make the right choices but He must give us our free will to choose in order that we become good in and of ourselves. Eventually we will all have the chance to hear and accept the gospel of love and righteousness. This is the will of God. He loves you!