Guys, what do you think about those famous people in other sports (like UFC, MMA) then suddenly will shift into boxing, not via professional boxing, but as an exhibition match? Or those who are already retired but suddenly will participate in an exhibition match against a non-boxer. It was all started by Floyd Mayweather Jr. and then from there, lots of boxing exhibition matches have been executed.
And the sad part, these people who are participating in exhibition matches are being paid more compared to professional boxers.
It is all about money, either for personal gain or to cater fund for charity. And I also think that it isn't Floyd Mayweather that started this kind of exhibition. Ali once made an exhibition fight against a Puerto Rican comedian Jose Miguel Agrelot (with Iris Chacon acting as Agrelot's corner-woman)[1] So Floyd got the idea from Ali to earn more money.
And the sad part, these people who are participating in exhibition matches are being paid more compared to professional boxers.
This is normal, it can't be called an exhibition fight for nothing.
[1]
https://en.wikipedia.org/wiki/Exhibition_fight#cite_note-13