Humanities major here. I did have to do Stem courses. Geology was interesting but I got a bad grade because I didn't have enough brain memorization space - i needed it for music.Also, it's only fair for humanities majors to take the same amount of STEM courses as STEMheads are required to take humanities courses to graduate.
So far as I know, any post-secondary institution in Canada requires you to take some courses outside of your major in an effort to create graduates with a "broad education". I have thoughts on that, and whether it works, and whether the system could be improved, but that's another time. Regarding groups talking, I actually thing that the Arts should be part of STEAM (and I'm by no means a new person in arguing for this. Greeks lumped music in with mathematics.) I think the real place where cross-disciplinary stuff needs to happen is between STEAM and places like history and political science. We create, but we need to know the history of the why behind what we create, and we need to think critically about the consequences of what we create. That said, a conversation for another time.