That was in the
first sentence, home schooling is not mentioned again, and the article discusses lots of other types of people who work these jobs. The main focus is on the disparities between them and the sam altman types getting filthy rich off AI and how it isn’t exactly fair given that this “underclass” of people is necessary for the AI to work well.
There is an archive link in case you didn’t get past the paywall.
Also, you should know that some people home school their children for reasons other than the one you dislike.