This is changing now in past few years. The volume of people forced by covid to start homeschooling their kids, and those opting to continue is changing the demographic to be more mainstream. What once was more tiny pockets of fringe, or perhaps parents with DD children not able to to integrate with public school, is now taking on a much, much more broad population cohort.
There are a lot of parents upset with the liberal political indoctrination of their kids, the threat of Transgender promulgation of their children and as such are pulling their kids out of school. The voucher system is going to take hold across more states as result of parents fed up with the politicization of schools.
I too moved from a deep blue metro in a state that passed laws to teach sexual gender, including transgender topics, to kindergarteners. I have a 5yo. Hell no. They are just too young, perhaps 4th gr or 5th gr, sure a basic primer in their usual sex ed class. But at Kindergarten? I voted with my feet. Hell no. My kids are now in private school. I was a product of public school years ago, and even then things were already over politicized, pushing climate change fears and a myriad of other political propaganda. I listen to other family members that have just recently graduated or about to graduate highschool and the level of liberal propaganda being pushed is nauseating. I once embraced and understood the beauty and value of the history and what the American public school system was and looked forward to having my future kids experience the same. Fast-forward now, as a parent and where things are, nope. The system pushed too far into socialism and political indoctrination. Voucher systems will indeed destroy the public school system, but when the option is losing your child to unAmerican socialist propaganda versus fracturing a school system into silos of microcosms? I easily choose to sacrifice the public school system over my own children, bring on the vouchers. For those who can't afford private school while waiting for greater voucher roll out, I get and applaud their choice for home school. A slightly socially awkward child is far better than the next Greta Thundberg / antifa terrorist / bernie sanders growing up in your home.