For AP classes it takes qualified teachers, excelling students and money. AP classes don’t mean much if they aren’t taught well, students don’t pass the exams to obtain credit and/or have the money for testing.
Many schools do offer dual credit but then your grades count as college credit and if you don’t do well then your college GPA is damaged before you get started. AP credits can save a lot of money when applied to a college degree.
Schools who don’t provide AP classes on the basis of “we’re better than that and can do it better” are shortchanging their kids if the kids are capable of AP. College costs way too much these days–those AP credits can be worth a few thousand dollars in the long run to an individual.