What exactly would that entail? I “own” Hades, thus I can depict Zagreus in my own works, as his likeness is my property? I’m allowed to copy the game to a dozen thumb drives and sell them on the street?
It would mean that you were allowed to sell your license to somebody else, just as you would be able to with a physical copy.
It would mean that you could continue to have it, and be able to reinstall it on future hardware if Valve closed shop tomorrow.
Currently you can do neither of those things.