There's a big difference between applying a high concentration of fluoride to teeth where it's needed and then spitting the excess out vs swallowing a low conce

There's a big difference between applying a high concentration of fluoride to teeth where it's needed and then spitting the excess out vs swallowing a low concentration of flouride in drinking water and having most of it go where it isn't needed. The issue is people (rightly imo) oppose the latter and throw the baby out with the bathwater