I don't think it defeats the point if the sender's device automatically validates that information for them

Zeus Wallet, for example, implements the protocol extensions I made for zaplocker and sender's don't see anything exceptional other than just paying a regular-looking lightning address

Their wallet automatically checks signatures and stuff in the background & sends out a public attestation as to the amount being sent and the invoice being used, thus allowing both the sender and the recipient to acquire confidence that the money is really going to its intended recipient...though I must confess that my implementation does not go all the way with this, and there are still circumstances where the server can steal money from the sender without the would-be recipient knowing it

I still think it's possible to eliminate this trust issue entirely but only if all lightning wallets refused to send money anywhere without validating a bunch of stuff...probably a whole new, incompatible protocol is needed because if it's designed in a way that's backward compatible with the current protocol, you can't be sure everyone's adopted the new verification stuff