If you give parents vouchers then all schools are just going to turn into IMG Academy because American parents only care about things like football. Inner city parents, football. Suburban parents, football. Its the only thing that unites the country actually; the farfetched notion that their kids will be pro football players.
This is just complete nonsense, "American" parents care about a lot of things clearly. Why are so many students enrolled in Kumon and whatever after-school prep is popular these days? Are kids just shuttling themselves to all sorts of activities just because they want to?
Sure some parents care about sports too. Maybe because their kid is athletically gifted. Not every kid needs to go into STEM. Why shouldn't they be able to enroll in a school that focuses on sports?
https://en.wikipedia.org/wiki/IMG_Academy