For what it's worth, just about every single attack he has drains and locks out one's life force, that being heart Containers, which mind you aren't at all a game mechanic but an actual canon thing. The life force all Hylians use to function being contained within (Yes, hearts and stuff isn't just a funny gameplay thing, they quite literally exist in lore), Link is an extremely special case who has an absolute fuckton, roiding out his life energy by a ludicrous amount, such a thing lets him resist and survive the effects of Ganon's attacks far, far, longer than one would normally be capable of, and in some games this shit even lets him survive death manip, curses and all manners of abstract hax longer than he, or anyone would normally simply due to quite literally, having more life energy.
Basically what I'm getting at is it's important to realize Ganon's gloom is far, far worse than you'd realize by playing normally, think of it like how Dark Soul hax works where the more res you get, the more bar and buildup you have while a normal dude would have 0. A more apt example for how it'd work in most matches is if you tried fighting Ganon with the starting amount of life energy, that being 3 hearts, aka Garou is only really going to be able to get tagged a few times before he just straight up dies, maybe a few extra just due to his big dick willpower. Garou has very little actual leeway, 3-4 hits and he's done.