If true, interesting that it all comes down to likelihood of misconfiguration. However, I can't see anything fundamental that a VPN adds either. I wonder, if there was an ssh that couldn't be configured incorrectly and also had a little "anti-hack" tech built in (e.g. disallow more than N connection attempts per minute, etc., what ever is normally done).
After authnz, SSH runs a shell (or other specified remote program), while Wireguard just sets up a network interface. I think it's really hard to make Wireguard run something remotely as you connect, AFAICT.
You can achieve a somehow similar result running by OpenSSH as `ssh -N -D`: do not run anything on the remote end, work as a socks5 proxy.