You don't have to belief anything to use Guix or participate in the community. It's an odd sense of entitlement to demand that others accept, accommodate, and welcome your ideology in dealings with you.
I also find it strange that you ascribe "this isn't for you" (a comment made here by strangers) to the project. No wonder then that you interpret entirely harmless community guidelines as if someone told you "to go fuck [your]self".
Yes, and I believe that this attitude harms community building, education and adoption efforts. You specifically use the words "not welcome". Other, more welcoming projects typically don't use such language outside of a Code of Conduct policy document. I'm pointing out that I've been made to feel unwelcome and you're saying that is entirely harmless.
Do you see the problem?
You're (inadvertently?) twisting the phrase "not welcome", which I apply to behavior, to make it apply to people. If we can't agree on how to apply words we cannot use them to approach understanding.
Does it feel good to you when you ask a question and the reply you get is "this isn't for you"?
Requiring a private reply on an IRC server to unblock a comically common use case is exactly the problem I am trying to highlight.