Because that's a physical item, and it can't be duplicated. It's not yours, and taking it deprives the owner of it, and gives it to you. Stealing can be applied

Because that's a physical item, and it can't be duplicated. It's not yours, and taking it deprives the owner of it, and gives it to you. Stealing can be applied to non-physical goods. The argument that a digital copy doesn't remove it from the original owner. It's straight duplication. I believe piracy can be stealing, but I've heard all thr arguments ad nasuem.