The appeal of heavyweights is they're meant to be the biggest, strongest fighters, one punch can end any contest. People aren't interested in little fighters challenging bigger, stronger ones primarily because they can't win by KO. Nothing to do with whether or not they're a better boxer.

How many times on this forum do I read "i'll watch it if there's a KO." Some/many boxing fans are not even interested in seeing who's the better boxer, without a KO they couldn't give a fuck who displays the superior abilty, just the sparkage.