Parents will do only what they think will be best for their children. Full stop. In Silicon Valley, a lot of white parents take their kids out of the public high schools and into private schools because they don’t want their kids competing against high achieving Asian students. That particular instance doesn’t seem nearly as nefarious as the issue of poor black students being shut out of good school districts, but it’s driven by the same motivation.
There is not a lot of good literature out there that’s written by dispassionate, unbiased sources on this topic. You’re advocating socioeconomic/racial integration, but there isn’t enough *CONVINCING* data out there that supports the idea that that kind of integration is beneficial for everybody. If a parent has options, they’re not going to choose to be at the tip of the spear in what really amounts to a social experiment.
You’ve got your own kids’ skin in the game — for now. That’s not nothing. But that’s also not enough to convince other people to do the same thing. Disrupting the status quo requires something that is inarguably better, and the jury is still out on that.