That's the problem with Nostr -> not so simple and userfriendly. Not everyone knows what NIP is and how to deal with it. I'm not new with IT, but I have absolutly no clue what NIP is or how to use it. I'm probably not the only one..
NIP is just Nostr Improvement Possibility. The building blocks of how Nostr works are all NIPs of various numbers. Users don't need to know what a NIP is or what any specific NIP is for. You used a kind 1 note defined in NIP-01 to respond to me, and you had no idea of either. Your client didn't ask you if you wanted to create a kind 1 note. It just presented you with a reply button. Good design will obfuscate these technical terms away in your client.