Why is Pacquiao getting so much hype?

[Taeth]

... do you think if Barrera went up 5 pounds to fight Castillo he would win? Or if he the Castillo who went toe to toe with Corrales at this point in his career? Barrera can't hurt Castillo, and Castillo who hits harder than Pacquiao would knock him out.

That's why we have a P4P list in order to compare boxers from different weight category without having them to actually fight each other... Imagine a heavy fighting a fly ... P4P is subjective but yours is so unique where Margo and Castillo are ahead of Barrera...
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I know what the p4p list is for, but Barrera right now is 5 pounds south of Castillo so have them fight at 138.5 and who do you think would win? or 137.5 is Castillo would do it? THats a catch weight in between their weights right now, and Castillo would destroy MAB.