It’s data.
It’s never “owning” in the traditional sense, because data is not physical.
When people say they own something, there’s an implication that it’s theirs until they decide to part with it. That is true for games bought without DRM. DRM free the closest you’ll ever get to ‘owning’ data, you possess that on your own local device and it can’t be taken away.
You can lose the ability to download the game, sure. But that is an additional service, not the game itself. You have that data until you delete it. Same with GoG Galaxy. that’s an extra service.
You’re arguing 2 or 3 different things. Ownership as a legal right, ownership as in possession, and a weird third thing where you seem to be confusing meta services with the ownership of the thing itself.
These reviews never do a great job talking about UI/UX and that’s literally the only thing I care about until they get the steam deck OS or Microsoft actually enters the space with a Windows version.