Like it or not, by the very definition of obsession, there are things, in fact a great deal of things, that will be sacrificed for the object of our obsession. These sacrifices, although perfectly acceptable to some, are completely inconceivable to others. I truely love my obsession, and have yet to find anything worth giving it up for. It is the extreme that makes the exceptional. I don't agree.
Obsession has such a negative connotation.
It's human nature to want to be the best that one can be. I don't agree. I think bodybuilding by it's very nature needs to be an obsession. How else can you keep doing what it takes to gain size, stay lean, etc. As for drug use by humans, there's a long history of it for a variety of reasons.