You don't live in the Bay Area.

Schools around the Bay Area are closing, especially in rich areas like Saratoga and Cupertino. That's because parents who can afford it are moving their children to private schools because of exactly what the OP was saying.

Schools are incentivized to focus on struggling kids because test scores are how teachers and schools are evaluated. The kids at the high end of the class are literally ignored. I know this because in my old neighborhood many parents were complaining about this. And then on top of it, the superintendent was begging parents for donations because they didn't have enough money.