Agreed. I also think that bottom-up learning might lead to a false sense of completeness, a sort of "now I know everything". But in reality, there is always so

Agreed. I also think that bottom-up learning might lead to a false sense of completeness, a sort of "now I know everything". But in reality, there is always some other perspective that will really improve understanding. That being said, I think learning fundamentals is very valuable, of course.