The transfer does not include the private key for the address, so how can it be claimed that ownership of the address has been transferred? Furthermore, even if the private key is also transmitted, then ownership is only shared and not transferred because the previous owner still has the private key.
In this 'NFT' project we call it 'ownership'.
I think I understand completely.
My question is what does "ownership" in this system mean? What is the significance of "ownership" beyond simply controlling the address in the last signed message in the chain? How does it relate to the real world?