Because you’re only ‘exposing’ the port on the peer to peer network.

You “publish” a port to holesail, then clients have to create a local proxy via holesail before they can access it.

I agree, It’s a dumb pointless claim. But I don’t think it’s misleading.

It looks like holesail is just tailscale, but on a much smaller scale. It’s not networks, it’s just ports.