I agree on this for most users. However anyone planning on being a professional athelete (bodybuilders and football players for example) can't afford to worry about things such as their health. The question comes down to one's goals. Personally, yes I worry about my health, and it limits what I use and how I use it, however I have no asperations of being earning my pro card. I'm playing the devil's advocate here, but the truth of the matter is, to make it in such sports, requires one to sacrifice their body.