I don't know why people find her persuasive. Is it that she expresses blatantly ignorant, prejudicial exclusion in a calm tone with a smile so her audience feels better about themselves?
I watched HJ's video with Jordan Peterson and wrote about it: https://medium.com/@tuckerlieberman/jordan-peterson-helen-joyce-meat-lego-8e64824680b8
Additionally, I have a used copy of HJ's book Trans (which I've read) and I still plan to write an article dissecting its arguments. However, when it comes to stomaching that nasty job, it's always a "today is not that day" for me.