Teachers are not underpaid. We live in a free market society and they have extensive collective bargaining agreements. If anything, they’re overpaid vs a totally free market.
Those who can and want to use those same talents in a different progression are free to do so. Nobody is forced into the progression (okay maybe grad students but that’s something else…).
> I recommend being a teacher to no one, and will help any teacher who wants out into a better career or industry.
People who genuinely want to teach should be teachers. Just as people who genuinely want to cure the ill should be doctors.