>Unless it's free of DRM and easily copied, backed up, moved, etc,

Even in most of these cases you don't legally own it, either. Even when you buy a DVD, you are just buying a license to use that DVD to consume the content on it. You don't own the content, and it's a violation of that license to copy a movie off of a DVD and onto your hard drive, for example, even if it doesn't have DRM. It's just that the legal content owner typically doesn't come after that type of violation.