[XorNot]

Okay but why does this matter? They're your ISP they also have your address, credit card number and a technician has been in your home and also supplied the router in the common case.

The theoretical vague problem here is being used to defend a status quo which has led to complete centralization of Internet traffic because of the difficulty of P2P connectivity due to NAT.

[iso1631]

No device on my ipv6 vlans can establish P2P tunnels outside with random clients.

Firewalls and good old monetisation prevented your p2p connectivity utopia, not nat.