The stealing bit is a red herring. Copying is not stealing. I'm pretty sure I can now borrow a car and, if someone was willing to lend me a fully equipped work

The stealing bit is a red herring. Copying is not stealing. I'm pretty sure I can now borrow a car and, if someone was willing to lend me a fully equipped workshop for free, build an exact replica of it without cost (in money). So in that sense, a car and a music file are the same. It's just that it's practical to do it with a music file, and not (yet) with a car.