I've not challenged or questioned your points. The scandals, CoC, []Gate, on the other hand, doesn't really seems to be working, because they keep popping up. Hence the thought of pseudonyms.
I know there are a few projects with ~100 people, but I am not aware of anything larger than that which is not what we would expect. So the measures we apply today like CoC's seems to have no effect on how welcoming the industry feels to marginalized people.