Educated people can neglect their kids. And less educated people can still recognize when education is valued by society.
Now look around. Do you feel like we're living in a society that values education? Did the successful people that kids see in their formative years get there through education, and/or do they visibly value education beyond lip service?
Some of them, yes. But I'd argue that between influencers, teachers' pay, and the increasingly obvious nepotism and corruption by people in power, the situation is looking pretty dire. We don't truly value education as a society and are therefore teaching a new generation that education isn't to be valued. And that has nothing to do with genetics.
Teachers never got rich, that's fair, but there was a time, at least in my culture, when teachers were usually one of the most highly regarded and respected people around, on a similar level as priests and doctors.