Quite right. Wouldn't it be possible to cut out the middle-man, have a Steam-like storefront producers could unload to? Games are now billion dollar affairs and they don't need to rely on the likes of Viacom or the like.
This is basically what Netflix used to be before the existing distributors realized they wanted in on the new action. The same pattern is playing out in games as well, though slower. Origin, Uplay, Battle.net, and most recently Epic are all trying to cut in on Steam's dominance and using exclusives as leverage to do it.