By that logic preventative anything is useless, the whole point is to know if what I'm doing right now is going in the right direction or not. Better catch dia

By that logic preventative anything is useless, the whole point is to know if what I'm doing right now is going in the right direction or not. Better catch diabetes or cholesterol when it's not a problem yet, when the symptoms are bad enough for you to notice by yourself you're already in deep shit.