Yes! That's what I'm getting at. This protocol optionally allows you to sign with your private key, but you don't have to for the protocol to provide utility. It could just be enough to say "if you trust magicseth's binary and apple, then this was typed one letter at a time"

There's nothing stopping folks from typing a message an LLM wrote one at a time, but the idea of increasing the human cost of sending messages is an interesting one, or at least I thought :-(

The problem is that it's not optional to end-users if sites enforce its use.