I didn't say no simplification. I said, it can be useful, but at least admit what you're doing. So, I think we're in full agreement. I think part of the issue

I didn't say no simplification. I said, it can be useful, but at least admit what you're doing. So, I think we're in full agreement. I think part of the issue is teacher ego, some teachers feel like they only have authority if they're always right. On the first day of my AP history in high school we were going over the dawn of man. My teacher listed a bunch of proto-humans, and then got to homo habilis, and said that homo habilis was a fully modern human. This piqued my curiosity, so I raised my hand and asked, "If they were fully modern humans, what is the distinction between them and homo sapiens?" My teacher yelled, "Are you trying to make me look like an idiot!?", and ran out of the room crying. I asked less questions after that.