“In TX, the students pay.”
Instructors who teach AP courses are required to take additional training courses and most states/districts give them additional pay to teach those courses. Some districts/states pass that along to the students in fees; others absorb it.
There may be legitimate gripes about some courses, but to say that it should all be tossed out seems....misguided.
All teachers are required to take Continuing Educ. Units in the summers be it AP or 1st grade teachers.