The only way someone would be “not allowed to play the game” is if the server admin bans them, and then they just go find a different server.
I’ve said it before and I’m going to keep saying it every time someone wants to introduce artificial handholding as a vanilla feature: Rust is not finished, and it is very definitely not balanced right now. Balance is on the to-do list, and it’s far easier to worry about small balance tweaks later, once you’ve put together most of the gameplay elements and components, rather than try and balance something that’s 75% unfinished.
Rust has a learning curve, and it’s a learning curve that’s made all the steeper by the fact that it’s not finished and it’s not balanced. Base defense is incomplete; weapons are incomplete; the building system itself is incomplete. Yeah, you can offer your feedback about how Rust is difficult for new players, but learning something new isn’t easy and nobody is even claiming the playing field is level right now. Rust is going for something a little different.
Shelter isn’t complete, either. Consider these concepts from over a year ago (that doesn’t mean they’ll never happen, but it’s all about priorities):
Clever lone wolves could live out of those practically forever, if they were smart about placing them (and another thing that isn’t finished is the map, so that there is more variety and more opportunities for everything).