The problem here
You dismiss the groups as ‘mommy groups’ and mention emotional attachment, vulnerability and manipulation. Do you not think women can deal with this themselves ? You mention how you have spent time refuting the claims of the anti vaxxers, well that’s all very well but women can speak up for themselves.
I recently had a discussion on an anti abortion forum with a man who was pro choice, he was trying to tell me of the impact on women and how women were vulnerable and how he was helping them by defending them in his posts. He got short shrift. We don’t need men to do it for us,