True but I think it goes beyond that. In Latin America the doctor can not even be 100% sure what he is using is legit since counterfeits, and poor quality products are so prevalent. So even if he has good intentions things can and still go wrong. Hence the added risk of leaving the developed world for cosmetic injectables.
Most people are not thrilled about going to the gym. If this was an entirely safe procedure it would be much more popular I imagine.
Anyhow I hope the original poster is happy with the outcome and continues to update us. I am sure he researched this and felt the benefit justified the potential downside. Personally I would much prefer a complication in my chest vs my penis. If the doctor did in fact actually inject it in himself, that would be a good sign he has not had many bad outcomes.