To what end?
Due process is meant to guarantee the rights of the accused; however, no player has any cognizable right on any game, save for what is promised by staff. Staff who think they can adequately or properly investigate a situation in a manner that promptly and completely addresses it is kidding themselves or lying to players. Games by design are at best benevolent dictatorships and at worst a god-fantasy out of Black and White. So the only reason anyone would want to follow an investigatory procedure is doing so to protect their own sense of self-righteousness.
If the best one can hope to be is a beloved tyrant, it serves no purpose to pretend to be anything else.
I disagree with this premise. In the past, as a game runner, I tended to overreact to the first person who brought me their sad sad story, empathizing with them immediately, and bringing down the hammer with very little to no investigation...exactly the behavior that quite a few individuals say they want.
Later I discovered that by failing to get all sides of the story, I had actually played into the designs of bad actors, sent some of their victims packing, and sent a message to the other victims that I would back this person's word, making them feel even more trapped.
So maybe I'm lying to myself, I'll grant it's possible, but my particular motivation is not wanting to make that particular mistake again, and not wanting to play into the hands of actual abusers again.
It also grows out of the place where I started gaming: tabletops. Where the GM has the responsibility to adjudicate the rules fairly and to handle problem players. At heart I'm still just a GM, with a slightly different table, and to me adjudicating fairly requires that I know what the heck is actually going on in the first place. And not allowing myself to be manipulated because I can't slow down to do a little due diligience.
YMMV of course, and I'm not denying that staff often does a fat lot of nothing. Which is why I say...not all game runners are equally talented at all aspects of game running. Or equally principled. Or are even coming from the same places in where they feel they've made mistakes and created bad outcomes in the past.