First of all, are kids not free to choose which public school they will attend in the US? If so, is that by law? Do any US states allow a choice of public schools? If not, why not? Also, school curriculums were standardized where I was a kid, so there wasn't ever the problem of creating siloed "thought" schools. Isn't school curriculum standardized in the US?
This was such a non-problem in my experience, I am honestly a bit surprised how controversial it is. It would be great if anyone gave more context, as that article relies on quite a lot of US life experience.