I agree with your main point but I don't think less smart people are any happier for believing in more mainstream philosophies. The reason smart people usually

I agree with your main point but I don't think less smart people are any happier for believing in more mainstream philosophies. The reason smart people usually don't resonate with these philosophies is that they're brittle; look at them a little closer and you can see the cracks. People who choose these philosophies will come to know of the existence of the cracks, usually by others pointing them out. After that it's some form of willful ignorance which nags at the soul.