I've come to the conclusion that some abusers actually believe they are natural because the needles have become an essential part of their life.
I think you might be right. Some guys that use for a long time and train hard for a long time forget that despite their efforts their gains aren't necessarily their own. Yes, they've put in the gym time. Yes, they're dedicated. Yes, they stick to a good diet, but the gains just ain't all them.