In Harvard's own words:

https://harvardmagazine.com/2020/05/right-now-risks-homeschooling

“But it’s also important that children grow up exposed to community values, social values, democratic values, ideas about nondiscrimination and tolerance of other people’s viewpoints,”

I think an overwhelming majority of legislators and American people, if they looked at the situation,” Bartholet says, “would conclude that something ought to be done.”

"The issue is, do we think that parents should have 24/7, essentially authoritarian control over their children from ages zero to 18? I think that’s dangerous,” Bartholet says. “I think it’s always dangerous to put powerful people in charge of the powerless, and to give the powerful ones total authority.”

But surveys of homeschoolers show that a majority of such families (by some estimates, up to 90 percent) are driven by conservative Christian beliefs, and seek to remove their children from mainstream culture.

“That means, effectively, that people can homeschool who’ve never gone to school themselves, who don’t read or write themselves.”