Exactly. A high metabolism is like exercising when you aren't doing anything. That's why it's hard for us to gain muscle. I recently predicted that higher thyroid output would help in bulking, but then realized it would only work against me. Yes AAS or other anti-catabolic things will help slow degradation of muscle, but it's still more beneficial to just let your metabolism do the cutting ( for the record, that's IF you had a high metabolism).