Looking at OpenSSH tells a different story. It is a massive, overly configurable behemoth. The 'WireGuard of SSH' would be 1% of the LOC. It would not provide password auth, or let you log in as root with password auth, or let you use old insecure ciphers.
Maybe OpenBSD itself is better at sticking to these principles than OpenSSH. I haven't used (experimented with) it for ~5 years but read about various updates every so often.