Because his chances are not the same anymore just like his power, speed and defense maneuvers. He cannot hide that fact that he is already old even if he's still fight in exhibitions, he will have the ring rust effect if he will choose to deal with the likes of Pacquiao nowadays, a May-Pac fight is profitable but knowing Mayweather, he doesn't want to get embarrassed from being defeated.
He doesn't really taste defeated ever since so what do you think he would feel if he gets defeated by Manny Pacquaio, or any boxer there is or should I say a Youtuber or an MMA fighter defeating Mayweather that level of embarrassment he would feel, because he hasn't experienced it at all, so experiencing it now could be a different effect for him, I'd say I'd really like to see that he gets embarrassed by a non-boxer inside the ring and the sports that he loves so much, I really want to see his reaction, and what would he feel,
The commission or organizations of boxing will just have a few words of condolences and a portion of financial help then that's it. Not everyone has to stop what they do because someone has gone through a tragic way of death. It's not just a few but many already and yet, the sport keeps on moving and any athlete that has chosen this path understands that this is the risk that they will take and the consequence that might occur could be tragic for them and for their family.
Well, I really get it that they really can't do a thing about the deaths in boxing and it is really hard to prevent it because combat sports are pretty much really risky, well I just really want to prevent most of the deaths but surely it can not be prevented, and I think it is time to leave it this way because nobody wants a change,