some people have few issues others have loads.I've not been to a dentist since 2006 While that may shock some, in my over 3 decades I've never needed a filling, never needed a hygenist and generally never needed any form of dental work done. I can't actually think I've ever even had toothache or thought to myself 'hm, I might need a dentist for that.' My teeth, gums and mouth are generally in very good shape, I think!
Ironically I did make an effort in February and signed up/got an appointment for April, which obviously got cancelled! Awaiting another slot in the new year...
probably a lot has to do with peoples diets and if they really brush 2-3x a day properly.
I've known a few women in my time who are really lazy when it comes to brushing teeth.... they are the ones who need it most lol....a lot of people have big problems with their teeth during pregnancy