> I thought the humanities were supposed to train you to better express and share ideas?

Of course. But that applies to ideas broadly, whatever you happen to be working on.

Whereas the OP apparently wants something like a top 10 list of brilliant humanities insights, which is a misunderstanding of what students are learning: skills, not atomistic facts.

Even in the sciences, students are learning skills, not just facts and equations. The key is the ability to use them, and that takes a lot of practice. The result is a skilled scientist, not a container of facts.