There is still a difference. Even if you use SSH for some things (which you could only expose through WireGuard instead of making it internet-accessible), WireG

There is still a difference. Even if you use SSH for some things (which you could only expose through WireGuard instead of making it internet-accessible), WireGuard protects your VPN traffic in ways that SSH does not. WireGuard renegotiates the session key every 5 minutes (SSHv2 uses one ephemeral key for the entire session), it has identity hiding (you can't tell at any point the public keys of the server or client), it has pre-shared key support to limit post-quantum or ECDH attacks, and so on. I really can't overstate how awesome WireGuard is. I really would suggest you take a look at it.