Part of it is sunk cost fallacy. He's already spent so much time and energy, and already gotten half fucked up from getting hit in the head, that he wants that to be worth something. This is very understandable. This guy was training like an animal, in his 40's no less,while dealing with the stress of the event, for ~9 months and he wants those hundreds of hours in prep to go towards something.
And part of it is the simple pride of wanting 3 or more 1 round knockouts. He's an older guy, he's a nerdy guy, but the 2 times he's boxed in CC, he absolutely brutalized his opponent and you know, that just feels GOOD. Joe Rogan even commented on how he totally outclassed his opponent.
The guy doesn't want his time, energy, and thoughts to have been totally wasted. But they were. Even if he parlays it into this Misfits thing, Anisa and her cuck are still going to further waste his time and stress him out as they try to drag him into the drama of all this.