You seem like someone who can't think outside the box and isn't worth it but I have time to kill before my flight so I'll bite anyway.
Vitor, at the start of his MMA career, was from a developing country where steroids were available over the counter. He came from poverty and trained his ass of to become an incredible fighter by the early age of 19. Where he came from, there were more important matters than the moral value of using steroids in professional sports, like putting enough food on the table for your family to survive.
He probably listened to his camp when coming up and did not question their mentality of how to be the best that he can be. Unlike a protected American public school product such as yourself, Vitor probably didn't attend a health class at 16 years old taught by a 25 year old blonde chick/ He never heard the talk about how bad steroids and weed were. Vitor was probably training his ass off at this age every day before going to his 1 bedroom 1 bathroom house.
I'm not saying whether using steroids is right or wrong but I can always tell the ignorant privileged know-nothings by how they post.