Yeah, I would say the groups in question are notionally, aspirationally rational and I would hate for the takeaway to be disengagement from principles of critical thinking and skeptical thinking writ large.

Which, to me, raises the fascinating question of what does a "good" version look like, of groups and group dynamics centered around a shared interest in best practices associated with critical thinking?

At a first impression, I think maybe these virtues (which are real!) disappear into the background of other, more applied specializations, whether professions, hobbies, backyard family barbecues.

It would seem like the quintessential Rationalist institution to congregate around is the prediction market. Status in the community has to be derived from a history of making good bets (PnL as a %, not in absolute terms). And the sense of community would come from (measurably) more rational people teaching (measurably) less rational people how to be more rational.