When it comes to dental treatment, should I prioritize gums over teeth as I get older?

In the past, I didn't worry much as long as my teeth didn't hurt.

However, if you look around, as people get older, rather than cavities
It seems that there are many cases where people receive treatment due to issues with the gums or the parts supporting the teeth.

I would like to know what areas I should focus on checking regularly after middle age.