I fit the description of being happy, but then outside the usual ups and downs, I was happy before I grew older--I never had to wait to be happy.
Being religious is propping them up to ignore their doubts. It can work for people who don't have to think too deeply on what they're believing.
I have no doubts about God. Questions yes, and continual study and exploration, yes. I have had a couple of experiences of God, and those experiences remove all doubt. Seek and you shall find. That's true, but the kicker is having to stay with it for decades. Faith/religion is amazing, and after an experience with God, I feel quite confident in saying those without that kind of experience don't even know what it is like to think deeply. You may be a more shallow thinker than you know. At least consider that possibility even if it is on a rare occurrence.
As to them being females, those being referred to here are most likely content to stay in the kitchen and obsess over not overcooking bubba's steak.
I have been in the kitchen. Also: Journalism, public relations, accounting, managing apartments, and teaching. I also quilt, sew, garden, and do genealogy research. I have always led a full and busy life. By the way, my husband grills the steaks--none better. He has also made sure he brings home take-out at least once a week.
It's the American intellectuals who have to suffer the doubts on America's survival as the uncontested world superpower.
I have no doubts on America's survival of a superpower--it won't survive. It is already in decline and has been for awhile. It will fail and fall. That handwriting has been on the wall for several decades now.