> There's too much focus on the "what we know" like Kreb's cycle, which is easily examinable. The focus should actually be "how we found out", something like what the book A Brief History of Everything traces out.

The problem is that in school there is far too little time to teach this all. There is already too little time to teach the curriculum material. Thus, if you are interested in such topics, simply go to a decent (university) library.