> If every dentist did this, the genepool would improve

I grew up in rural Kentucky. One of the worst, most ineffectual education systems on this continent.

We were still taught, very clearly, and with zero ambiguity about how genetic inheritance works.

A 7th grader in bumfuck Kentucky knows more about genetics than you've demonstrated here.

Since you apparently missed class, I'll explain: evolution by natural selection only applies when the adaptation in question affects survivability before reproducing.

A genetic problem that causes you to die or become infertile before you've had children can be evolved away. Anything that happens to you after reproductive age does not get affected by natural selection because the selection pressure of reproduction is gone.

This is called an evolutionary shadow.

Again, this is what we teach to middle school kids in rural Kentucky. You really don't have any excuse to be so ignorant.