Valve could take a lot less and it wouldn’t kill them. Or PC gaming. Wouldn’t be whatever frothing insult you pretend it is, either. It’s just… less money. They’d still make a shitload of money. Just… less.
The number can be smaller and the sky wouldn’t fall.
The number right now is obscenely high. It’s the most they think they can get away with. And they can only get away with it because of their de-facto monopoly, which should end.