I read your whole post, which ended with "if users copy around fingerprints", which is a problem the built-in SSH PKI that large fleet operators already use solves. I don't think I misconstrued you.
You don't have to keep replying, but I'm going to point out that we have gotten no closer to finding a reason that anyone would even entertain the idea of SSHFP, a system that wires the already perfectly good SSH PKI subsystem into the state-controlled DNS PKI. Why would anybody ever do that?