My impression of that note in the context is in line with Sartre's intention (or at least according to several highly reputable online sources.) Arcosanti seems

My impression of that note in the context is in line with Sartre's intention (or at least according to several highly reputable online sources.) Arcosanti seems set up for free thinking but then is also a highly socialized community so likely very constraining for someone that wants to be individually creative.