There is a whole lot more nuance here than you're giving the topic.
There is one side that wants to give their kids a good education, they have the resources and the motivation to ensure they come out ahead.
They are not the problem, the problem is the other side of this coin.
Where I grew up there were a lot of homeschooled kids that belonged to religious organizations. These groups had very little motivation to ensure they were intelligent, but instead nice dumb little worker bees that would stay with said organization and have little ability to work with the outside world at large. They were also at a much higher risk of being sexually abused/sexually trafficked as they were given little to no education about sex or risky adults.
I still remember being a kid myself and having to educate these other kids my age because they were missing large chunks of important information about the world.