> There is no nuanced discussion about this. Theft and stealing are legal terms
I think you missed OP's point; those calling copyright infingement "theft" (or "stealing") are being disingeneous to try and gain support for their argument - they're conflating legal terms about ownership with the idea of copyright infringement and they are not the same as theft/stealing include the concept of depriving the owner the use of whatever it is that was stolen.