What exactly does "unprotected" mean in this context? I mean ssh means secure shell, so shouldn't the ssh be secure from the start? Or, a better question, what

What exactly does "unprotected" mean in this context? I mean ssh means secure shell, so shouldn't the ssh be secure from the start? Or, a better question, what would you need to do to secure your server and why aren't these steps "on" by default? I mean, even any new WiFi router you set up comes with WPA enabled by default. Wasn't always this way. I still remember setting up routers where the password protection was an afterthought. But ssh isn't really that new is it? Should these security measures be default at least by now?