I'm not sure I'd call a programmer "brilliant" if they cannot A) make a codebase simple enough for people to contribute to and B) handle the social parts of training someone to get good enough to contribute to the codebase.
I wasn't pointing to the Clojure community at large, the Clojure community is very welcoming to beginners and newbies, like I was once.
It's true that the focus on the language is improving it for everyone, not just beginners, and that can appear like a bad idea if you're a beginner, but I personally agree with this goal.
The problem mentioned by parent is something I haven't personally experienced, but seems exclusive to their job/position/experience, and I don't understand calling that specific person/developer brilliant.