Allot of it is also education. I grew up thinking, if you get a cavity the dentist will fix it, no worries. But you're teeth can only be repaired so much, and every time it's more expensive.
I never asked any questions or tried to understand why I got cavities (in part cos of the cost). It was just... I have bad teeth, it is what it is. But it's not. there is allot you can do, foods to avoid, drinks to avoid (beyond the obvious).
But things are getting better, some dental hygienists are on YouTube now, who teach how to look after your teeth.