Well, I tried that with this thread:
How can we encourage people to learn less-IDed taxa? - General - iNaturalist Community Forum
Which petered out after 14 replies. Still, I’m glad I went back and reread it, because there was a useful suggestion there: starting threads or groups about certain taxa to help people understand them.
That comes from frustration, or maybe despair. It is still true that it came about after I failed to encourage people.