I mean, digital piracy isn’t stealing regardless of the premise that buying ≠ owning.

Stealing is taking another’s property without the intent to return it. Making a digital copy is not taking any property, it’s creating a reproduction of it. The only place left to argue that piracy is stealing would be to say that you’re stealing the company’s theoretical revenue… but that revenue was never tangible property, being that it’s your money up until the moment you give it to them. Piracy is, and only is, copyright infringement.