Why so demanding? I think fighters just have to fight and get paid according to the agreed amount in the contract. He is more interested on the job of the promoter, they are the ones who are taking care of that matter, they are fighters, they should focus on training.
I guess fighters now are more vocal than it was 10-20 years wherein they see this a job, with no security tenure. They just want to fight the best and see how "macho" they are compare to the other boxers in their division. That's why we have so many great fights in the past.
Now, boxers want more transparency, they have their own legal team to scrutinized every contract and may add some or contest if they don't want that to be included in the contract.
Compared to the past, there are only two titles so boxers in the past are not afraid to fight the best in their division, that's the only way to win the crown, but now we have five world titles and every champion on their respective divisions are afraid to lose their respective title through unification, and there are so many promotions now and they want to do their promotions in the house which means fight fighters that have a contract in their promotion, that is why the boxing community is deprived of the best boxer in one division