most non-nostr apps shouldn’t need to care about NWC, I don’t really see a problem. If another app needs NWC like functionality then they should propose a spec for their use case. nostr just happens to be popular atm and it makes sense to use relays for rpc in this context.
Discussion
But “just propose another spec” adds up a ton over time, each time we do that we’re asking every lightning wallet to implement yet more code, and the compatibility matrix of lightning wallets becomes yet more complicated.
This is already a huge pain point for users today - Lightning payment instruction formats are complicated and not reliably implemented across the ecosystem. Please please let’s not make it worse.