My guess is that this is related to the conservative attacks on education in the U.S., and it's especially insidious because, again I'm guessing, it's mostly liberal minded people who are buying into home schooling in part due to anti-education right wing propaganda. I live in Santa Cruz county, would not be surprised if we had one of the highest home school rates in the country. It feels like a combination of constant anti-education propaganda and the "snowflake syndrome" where parents think their kids are too special to be treated the same as other students in a classroom.