Why do boxing fans NOT UNDERSTAND weight draining effects for fight night?

[PRINCEKOOL]

I’m not sure you understand weight draining...

If Alvarez wanted to feel “as the big man” he’d be fighting exclusively at just 160. He is 30. His counterpart generation, others, like Spence and Jermall Charlo are draining.

They weight drain to make a weight, and then gain extra weight for the night of the fight.

Fighters do it, because they want to gain a perceived advantage.

They don't want to fight fighters their own size to a certain extent etc