Agree with your last point about building, making Nostr/LN easy to use.
The point is though that not everyone has to align with the core ideology of Bitcoin today. People from around the world can and should use it in the best way they see fit, provided they are not hindering others from doing the same.
Maybe this killer app or killer use case idea is something that bridges the divide between c. fin. and c. social media and the world of Nostr and BTC. It delivers superior value with the upside of taking back control of our information.