Steam is literally a monopoly. the Apple argument doesn't cut. you are free to use (F)OSS but go freelance graphic design with Gimp or Krita telling your client

Steam is literally a monopoly. the Apple argument doesn't cut. you are free to use (F)OSS but go freelance graphic design with Gimp or Krita telling your clients to f*-off Adobe files. or any CAD work. the average Windows Nvidia user won't trade convenience just take a quick check on wishlists, buys and views of indie people releasing games on Steam without marketing budget (money or popularity wise). it isn't a magic bullet, otherwise, marketing would be obsolete... even AAA industry burns millions of USD at 30% is a huge hit on top of all the thing studios have to pay. they just comply because it's either that or go home on the PC market; with rare exceptions like Minecraft and whatever popular is out there nowadays