No because part of what copyright is about is protecting the content as well, copyright holders get to decide what modification are made prior to distribution, if they are no longer allowed to do that then they've lost half of why copyright exists, and with that half gone it won't be long before they start losing the money (hey why should you pay somebody for a product that you modified before distributing, it's just as much your product as theirs at that point).
"No because part of what copyright is about is protecting the content as well, copyright holders get to decide what modification are made prior to distribution, if they are no longer allowed to do that then they've lost half of why copyright exists, and with that half gone it won't be long before they start losing the money (hey why should you pay somebody for a product that you modified before distributing, it's just as much your product as theirs at that point)."
Your argument falls flat on its face. As long as the creator is paid in full, there is no problem. As long as GM gets paid for its car, I can modify it any way I want.