I heard a few years ago that, because Fluoride has cut down the amount of decay, fillings and extractions, younger people have much better teeth these days, so dentists have to turn to orthodontics and cosmetics to keep themselves busy and the money rolling in.
You will have noticed how most youngsters have really nice teeth.
People with ugly and neglected teeth are getting rarer.
I have not had a new filling since I was about 25, I've just had the old ones replaced when they eventually wear out. All my recent work has been in White inlays or crowns so I am gradually getting a better-looking mouth.
Still have one gold tooth though, which I expect the crematorium will have one day.