Perhaps Mutual Criticism would be more attractive if we all focused less on being criticized ourselves and imagined instead being able - nay, encouraged! - to tell the most annoying people that we know all about their flaws. While they're not allowed to answer back, even. That might be pretty satisfying. I'd have some choice words for some people.

...Although honestly a subterranean dread of one's own Mutual Criticism might still lurk. Especially given that the community also used Mutual Criticism as a spiritual cleanser for the sick: I just imagine lying in bed, dazed with fever, while a grave committee gathers around and tells me all my faults.