I've never heard anyone say they don't understand why GSP or Mayweather fight the way they do. Some people just want more for their money.
One of the main reasons I've been a lifelong boxing fan is because of the amount of heart it takes to get through 12 rounds. There isn't another sport (in my mind) that is as grueling as boxing. These guys have to dig so deep within themselves to finish fights sometimes that it's truly inspiring.
That is why I am a huge Cotto fan, a huge Pacquiao fan, etc. They have amazing skills and technical ability, but they also possess something special that most people don't have. Something you're born with, not something you get from training.
Floyd has not had to show that, so I don't know if he has it. He's never been in a fight like Cotto vs Margarito/Pacquiao/Clottey. Or a Pacquiao vs Morales type fight. I know that people say, "Well he's just that good, he doesn't have to," but there are other ways to show it. For example, he could have put Canelo on the mat instead of coasting. He could have put Maidana and Guerrero down too. Or at LEAST he could have tried. It would have put him at a slightly higher risk, but it's something that all the greats did.
Say what you want about Sugar Ray Leonard, but the dude didn't coast very often. When he saw blood, he went for the kill. Most of the greats had that, and Floyd doesn't really have it. When we talk about him ranking with the greats I have trouble putting him with those guys because I have no idea what Floyd would even do if he had to really dig deep because he avoids that at all costs right now.
I've noticed some people on this forum seem to think knockouts are below them or something. I've seen people on here imply that hoping for action packed fights makes someone a less knowledgable boxing fan. That's absolutely ridiculous and can't believe you could say that with a straight face. This sport was BUILT on action. All the greatest fighters of all time were action fighters. If you watch boxing hoping for defensive wizardry and a low punch output then that is perfectly fine. But that does NOT make you a better fan or make you seem like you understand boxing more than anyone else.