You say that in USA there are no good teachers because any that are good will find better-paying professions?

This sounds plausible. Like the previous poster, I have grown in an Eastern European country where everybody was extremely poor by today's standards. Education was not perfect and there were many mediocre teachers and even bad teachers.

However, there were also a great number of very good teachers, so there were good chances that you would happen to have at least a few good teachers. There were also many opportunities for the best students to learn beyond the normal curriculum, either by self-study in good free libraries or by attending special extra-curricular classes held by the best teachers for various sciences.

I have a lot of friends who have migrated to USA many decades ago. All of them complain about how bad is the education that their children are receiving, in comparison with what we had when we were young, which matches what the previous poster was saying.

While in the schools that I attended as a young child the teachers would have been considered very poor in comparison with any US teacher of today, in comparison with most other professions available at that time they had decent salaries, so indeed there were not many non-illegal alternatives that would have been a better career choice.