Please dont. If Steam lets you download game installers then those games would also be owned by the customer but really, with any media, we always only ever buy a license, with digital its just worse because it can get taken away if its online. You need permissions to show movies and shows publicly and i think similar would go for games.Why don't you buy games on GOG if you are worried about not "owning" something.
Please you show us these 10k words. I'm sure it's a fascinating read.