Then why have my dentists over the past decades always asked me how much I floss (I don't) instead of giving me increasingly severe warnings about my tooth damage due to lack of flossing?
“How much do you floss?” In no way implies they think you floss often. It’s actually the reverse. For example, if someone ask “How much do you shower?” It’s a not so subtle hint that you stink, not that they think you shower often.