That's literally how it was presented in the game. That by killing Ghirahim and Zant they have a chance to beat Ganondorf.
To win a war (and even then, not really? He was still kicking ass) not a 1v1 fight where they got their ******* asses kicked. And nice try, you keep saying useless shit while ignoring the whole "yeah Ganon with an infinitely weaker fraction of the TF is comparable if not stronger than the group, but he loses with the full thing that makes him infinitely more powerful lmao", with dumb excuses like "uh he had help", as if that changes anything, he'd sill be going from as strong, to infinitely stronger, than himself as strong as a fraction of the thing he's powering up to.
He can have the full Triforce without being Ganon, which is what we're talking about.
Yeah he could, and he'd be infinitely more powerful than he'd be with just the ToP
They literally explain this in the game. It lets him perform the ritual to become Ganon.
Uh huh heard that the first five times, and once again, why the hell do you think he wanted that (because he's way, way more powerful and can consolidate the omnipotent power of the triforce just like he did in the Sealing War).
Lana and Zelda helping Link was how they defeated Ganon, so.
Do I need to explain the issue? Lana << Cia, who Ganondorf ******* brutalized, they're fodder, they're more distractions while Link did the heavy lifting.
Or hey maybe it's like HW legit doesn't give a **** about internal consistency and most of the scaling doesn't make sense because it aims solely to be cool instead.
Like newsflash, half the cast is canonically weak in canon, can't actively fight.
Gee, literally THE strongest Zelda game in the verse except Majora's Mask and the most about fighting? Of course we're talking about it.
HW is a spin-off, not even the second strongest, and works entirely on rule of cool, disregards canon scaling constantly, and has its own internal problems such as Lana's scaling, things like Ghirahim, Zant scaling, shit like Agatha, Imp Midna, and more ding things they explicitly could not in mainline. And then having ****** up shit like Ganondorf being stated verbatim to be terrifyingly powerful (in base), yet with the full Triforce, something that would make him infinitely more powerful than him in a state where he has only a minuscule fraction of its absolute, losing to dudes on par, if not below, him in a infinitely weaker state. And then you say "uh huh that makes sense". Dude, no it doesn't, it's absolutely asinine. All you've done is say that it happened, like yeah n shit it happened, but it doesn't make sense and spits in the face of like everything established since OOT, and hell, shit established in that very game.
You said "sometimes it makes sense for dudes to beat full triforce", it does not, all you've done is brought a PIS riddled outlier that displays exactly why it makes no sense.