Well, if looting is the norm, those who don't loot end up with less stuff. If they don't care about having stuff, then more power to them.
Similarly, BJ is competing in a "sport" where everyone is on a variety of PEDs. It's an open secret within the "sport." If you're not on PEDs, you are at a disadvantage because you will most likely be fighting people who are on them. And if you're not in this "sport" to win fights, what's the point of competing? It's great that BJ stands by his convictions, but you know what would have been better? If he had beat that cheating, greasy, steroid-ingesting sonofabitch named Rush St. Pierre.