There must be some other factors at play or I'd be much worse off. I've only had a single cavity in thirty years and I've never flossed once. I always get compliments from dentists even though I don't even remember to brush my teeth every day.
Anecdotally, I've had dentists notice the difference between when I am flossing regularly vs not at all and it has shown up in my gum measurements. I would even argue I've seen more benefit from flossing than brushing for my gum health. Though I've never had any cavities as well.
Same. I try not to eat sugar and especially candy/sweets. I don’t drink soda. I brush once or twice a day. I don’t even have wisdom teeth (pretty rare) so maybe I’m just that lucky.