How is the owner not deprived of your copy? Have you given it back to them? It’s an odd thing to mince over words like “theft” and “stealing.” If it’s the words that bother you, perhaps consider this: should it be permissible to consume a digital good without consent of the copyright holder?

If the copyright holder wants more exposure, that is up to them to decide. It’s absolutely unreasonable to do so on their behalf and claim it’s somehow doing them a favor. With that logic, any form of theft can be legitimized.