Turning water into wine, giving sight to the blind, walking on water, revealing things kept secret since the foundation of heaven and earth (when the Law was given as a light to the nations), leading people to the sanctuary of God, raising the dead, curing the paralyzed, lame, crippled and insane never were to be understood as supernatural demonstrations of divine power over reality by the intelligent, only the ignorant and superstitious would think so.
That being said, these things are metaphors for actual events, signs that Jesus was the expected Jewish Messiah, who was just a man chosen by God to fulfill Deuteronomy 18:18.
You may not realize this but it isn't about being Jewish or Christian, believer or unbeliever. There are dedicated atheists out there who would never eat the flesh of swine who do not ruminate and they would agree in the wisdom of that Law because they reap the benefit.
So in a way you are right. Some things are intrinsic but what is chosen by the individual is either wisdom or folly, to follow a spirit of truth or a spirit of perversity, with consequences for good or evil. For those who make evil a deliberate choice there is no escaping the consequences, death, a curse, neither is there escaping the consequences for those who cast there lot with the spirit of truth and do what is right, eternal life in the sanctuary of God.