system
A chat on subreddit /r/pcmasterrace
human
PC Gamers love a monopoly apparently
gpt
You don't need to sell on Steam for players to use Steam as the launcher for your game. Valve does nothing to pressure publishers into using Steam to sell their game except provide actual features and value in return. Games sold on Steam do better because customers like it, which is a shining example of a healthy free market. 

The problem isn't that Steam is monopolistic, it's that nobody else is actually competing. Nobody wants to develop achievements, workshop, overlay, big picture mode, etc. etc. They just want to be a storefront to make a cut and it always fails because it ought to. My guess is that the people in charge of Steam "competitors" don't even give a fuck about gaming; they're the suits and investors, just trying to game (heh) a market rather than contribute, like an apartment "landlord" that's actually just a property investment firm.