Nothing you can't do with a regular API call. It sounds to me like using nostr for the sake of using nostr.

I don't believe this kind of messages should be part of the protocol, adding every single edge case to the protocol over complicates it, overcrows network and relays:ñ; and slowly makes our private keys a single point of failure.

I just implemented a wallet in Nostros by using lndhub API calls and I never had the need of using nostr.