These are the things I can say about this...

If 2 boxers agreed to fight in a certain catchweight then I think each boxer thinks that he can win that fight in that catchweight (who does agree to fight at a certain catchweight and thinks of losing? )

If a boxer agrees to have his title be put on the line then it's his call... As long as all conditions of the fight satisfy the requirements of a title fight... Also it must have the blessings of the sanctioning organization...

So what's the fuzz?? As long as all parties (boxers, promoters, trainers, boxing orgs, etc) agrees that a fight be made at a catchweight with a title belt on the line then it's a go...
.