Earlier quoted context omitted.
> I still can't get over the fact that American textbooks also come in teacher editions with the answers to exercises provided so that the teacher doesn't have to work them out. Pointless busywork is pointless. If they can't find the answers, you're better off addressing the root cause, not driving anyone semi-skilled away from teaching. And just how many times have you graded 50 1st grade math tests, anyhow? Especia…
It's neither pointless nor busywork. Being able to work the problem or know the material well enough to accurately assess the quality of students' homework submissions is a baseline requirement for effective teaching.
It sounds like you've had bad teachers, for which I pity you. I had many good ones, as my mother was a teacher and my parents made sure we got a good education, both at home and at school. Perhaps you've only known people who were made to teach subjects they were unqualified to teach. That is sad, then, if you haven't known good teachers.
But that says more about you than teachers in general. You have something against teachers, as I've seen this axe ground before.