This is the illegal gain of someone else's intellectual property. "Stealing" is a reasonable word to use in this context.
I reckon we need a new word. "Pirating" has sort-of taken that space but it's not really good and it only covers distribution. It should be something that carries a meaning of "swindled", "wiped away", "theoretic-market-value-corrupted".
Stop justifying poor behavior. Just stop. Trust me, your cognitive dissonance will reduce, and life will overall get easier.
Or rather, somebody's life will probably get easier - just not mine.
It is just taking advantage of someone without their permission. That's all it is. There's nothing revolutionary or awesome about it. It isn't novel. It isn't creative. It isn't rebellious.
It is simply an unethical use of force.
For most activities in the United States, in 2021, this mode of analysis is flat out wrong.
Realizing this distinction is a path to liberation.