I’m not saying you’re one of them, but it seems the only time this pedantic definition of “stealing” is brought up is when that person is a pirate themselves, and they’re trying to justify what they’re doing as “not stealing.” As in: “I’m not stealing it; I’m just making a copy. The creator isn’t being deprived of anything.” Sure, you’re not literally taking anything from the creator, but you are robbing them of their right to do what they want with their creations.

Meanings change over time.

One can argue all they want about whether IP laws should exist, but as it stands right now (in re. to language and the law) it’s stealing.