i get your point but your argument is a bit flawed, epic is not responsible for what gemes do people make. Its completely up to the game developers what performance they get to squeeze out of their games.
The key part here: If someone’s game runs like a*s then its up to them to optimize their game, not epic.
People are not forced to use any features, they can use much older versions or disable features in specific unreal versions and even modify the source however they see fit.