Well, a lot of kids lose interest in school subjects for a lot of different reasons! I remained very interested in math, physics, and computers, gained some more interest in biology, etc. But this way of looking at life can be weird and alienating. I think part of the fascination is how life kind of keeps going on nevertheless. Regardless of what you think about the nature of language and meaning, you have to act in society. And you sort of have to cope in your own way with the big thoughts while also coping with the ordinary stuff.

Various insights into evolution, biology, materialism, or what have you can't really negate the reality of what's going on today. Or if they seem to do so then the insight is probably incomplete. I'm reminded of the way people use rational scientific rhetoric to exclaim that religion is irrational and dumb; well, but how about using that rational science to investigate how and why religion is a part of human psyche and society? Etc.