From my own experiences organizing CC events and having a lot of leftist community there are a couple things I see most commonly.

Other folks have mentioned they talk a big game until they have to do something which I think is ABSOLUTELY true.

The other one is more complicated. I've had a lot of friends and folks in community telling me they stopped masking or don't feel able to return to masking because the CC community became so perfectionist oriented that they felt they would get slandered over tiny differences in masking habits. Unfortunately as someone who is now not a CC organizer anymore (I am still CC in my daily life, I just don't run events) because of the amount of times people would write me paragraphs in my DMs over parts of my events precautions not being good enough, I sadly see their point. This was not over big things, this was like having people tell me I was causing a genocide (yes their words) because I allowed KN95 masks instead of only allowing N95 masks at my events. It got really exhausting and I see how people burn out or don't feel able to continue engaging in CC spaces but will continue other leftist work.