Monopoly on a platform that they don't own? That being Microsoft? Then seeing how epic isn't even profitable on the launcher side and is a loss leader while their launcher is barebones it raises the question of what cut is actually realistic that allows a company to have a feature rich launcher and branch out into stuff like Linux, VR, and Steam Deck.
Current state feels more like Walmart expanding into new territory and trying to lure people with low prices, but isn't sustainable with the main goal just being expansion.