>>82502366
This is a psyop meant to lead idiots into a false sense of security. The brushing does very little, the modern diet itself combined with common mouth bacteria are the culprits. People are finding out that brushing never stops the cavities and people that weren't going to get them didn't get them regardless.
If you still want to eat trash and drink/smoke you need to at least use the antiseptic version of listerine (not the alcohol-free) to kill off the cavitation bacteria. There's also psyops about listerine for this exact reason to scare people away from using it. Also consider Closys mouthwash.