This is exactly it. Note that Apple has yet to go after or sue someone simply for repairing an Apple device. That's never been the case yet. They've only sued p

This is exactly it. Note that Apple has yet to go after or sue someone simply for repairing an Apple device. That's never been the case yet. They've only sued people who claim to use genuine parts that don't, people who have used stolen service manuals, or companies that claim to do authorized repairs but don't.