If what the Dentist said about my teeth grinding 40 years ago were correct, I should have nothing but nubbins for teeth by now.
Dentists these days are always looking to maximize your insurance coverage. If you haven't hit your yearly cap on insurance, they feel they've left money on the table.
Me, I make him "watch" a small cavity, and in almost every case he's been "watching" the same small cavity for literally years with no growth.
I am someone that needs to use a bite splint. My upper canines are flat from grinding at night when I didn’t have one.