It’s not folk wisdom. Old ass people, who can pay for it, get more restorative dental work and are more likely to be dealing with diseased oral tissue, etc.

And we can all see that his fake-ass, extensively capped and veneered teeth, aren’t showing signs of phosphoric acid damage.

But that’s the point of restorative cosmetic dentistry, to hide the damage.

Dude is old and decrepit. His brain is clearly rotting, but he’s absolutely clocked in extra hours getting dental work too.