Dude, unless you’ve ever tried publishing your own game you should stop parroting stuff you hear online. I’ve released a (borderline shovelware) game I made for educational purposes, and steam is god damned amazing and has such good support for a novice like myself. On the complete opposite of what you’re claiming, the gamers and indie companies stand to gain the most from a service like steam.
It’s not surprising that it’s more or less only people from huge companies like blizzard and Ubisoft who complain and try to gaslight Valve. If I were to release a game again I’d rather publish it on steam if they took 60% of the cut than anywhere else. (Unless you want to pay me a godly amount of money for exclusivity Epic Games, then hmu lol)