I think there are more that have fallen victim to the “tyranny of experts” and have been convinced that they can’t do it as well as an “professional educator”.
Our society has become overspecialized. It leads to efficiencies, but causes inherent weaknesses overall.
I agree with you, and actually don’t see how a smart recent high school grad can’t teach younger kids, since the entire curriculum is not that difficult to master.
I was more speaking to the economics or other reasons why there may not be the full-time stay-at-home parent that is otherwise needed for supervision for younger kids.