A musical “file” is not an item. It’s a piece of information that is stored on your computer. Providing information, although it is a useful service that can be charged for, is not like creating a tangible thing; once you share information you have no say in how the person chooses to use that information and if they wanted to give it to someone else for free. That would be like saying people who shared a secret that you told them not to tell—in a sense, copying and distributing the information you provided them— be imprisoned for the same amount of time as a carjacker. Computer files are no different. It’s all information.