Author of the post and survivor of several cults here. Nix is nothing like a cult. There is no behavior control, information control, thought control or emotion control at work. There are just people that are passionate about the tool and want to see it thrive. I would hardly call this a cult, more of just an interest group with weird nerds in it.
Honestly after a while the language starts to fade into the background and you just focus on what you are doing. Keep in mind that I am an expert at this point and have prior experience with Lisp, Haskell and a little bit of ML; so the overall flow of the configuration language and the like is easy for me to feel my way into. I have been trying to work on documentation to help get people up to that level; but trying to explain things you understand intuitively is hard :)
I'm trying though. With my Nix flakes series I'm probably going to rebase a lot of it around using NixOS with WSL to make it easier to approach for newcomers.