I have no idea why anyone would want to watch a Mayweather fight.
This! I mean, why should someone be interested in a guy who is the best in a range of around 5 kilograms of body weight? Just realise how small the competition is in comparison to all sports with full fields.
Also weight classes are a strange and unusual thing in general. I understand that technically those lightweight boxers can be much better than those from higher divisions, but who cares about that in other sports? The body is usually always a factor which has to be predestined for a certain sport and everybody accepts it. There is no basketball for small people or ski jumping for fat people, so why fighting in weight classes? And then all the organisations like WBA, WBC etc. I mean, one world champion in others sports but around 50 in boxing? Come one, give me a break.
One could even compare it to tennis: Mayweather being the top star for being the top welterweight champion is like praising Schwartzman for being be the best of his size in comparison with all the others who are too small to have a really good serve.
Floyd Mayweather as the Diego Schwartzman of boxing. Really, that would be a valid analogy IMO.