There's no need for him to change weightclass, he's a man not a car, changing weightclass would be going beyond his body limitations and fight at a disadvantage, he's simply up on a peak so much above everyone else that there's no competition, and he can't tell how far above everyone he's sitting, he can't measure his strenght, because everyone is an easy win
So, is he really very strong, but how strong ? Or is everyone simply weak ? He wants to face a challenge where he'd give his all
Thank you for coming to my TED talk