It's sad. They're not just luxury bones in the US either. National healthcare here in Estonia only covers dental until you turn 19 and then all you get is a tiny annual benefit, rest is out of pocket. I believe that most countries don't give adults dental coverage :/
Essentially the health board is completely fine paying for cancer treatments, broken bones, or to have a suspicious mole removed. They'll subsidize prescription medication. But TEETH?!?!?! WHO NEEDS THOSE????!?
It's such a stumble of history that teeth were historically associated with barbers and not doctors, causing the dental practice industry to evolve separately from all other medical practices. Bullshit how a vestige of that lives on today in dental insurance coverage being its own special snowflake thing.