I suspect that Crawley likes to speak at conferences for medical specialisms where the attendees are busy doctors there to update their specialist knowledge in their own field unrelated to hers. Her audience, who are likely to know almost nothing about ME, take at face value what she says, and won't see any reason to spend time digging into the story behind her claims of anti-science harassment.
We are tending to assume that her audience are primarily scientists. I would suggest that her audience are probably primarily doctors, most of whom will never have done any research. They are trained to learn vast amounts of knowledge and apply this knowledge to treatment of patients. Yes, they should take a scientific approach to this, but they may never have actually carried out a research project or had to analyse and interpret data. They will read some scientific papers, but, I contend, are unlikely to have the time, inclination or training to dig below the surface of what is being presented to them by researchers.
The few doctors who go into academia also do PhD's where they supposedly learn research methods. I don't think most attendees at these conferences are researchers. The speakers are probably researchers, the audience mostly probably are not.
My point is that Crawley's message both about ME and about how to deal with harassment by avoiding sharing data, may simply come across as fairly irrelevant to a busy doctor's daily life. A momentary evocation of sympathy, and praise for her supposed courage, and a general negative impression of ME patients as difficult people to be avoided, and/or a vague feeling that there's some sort of unpleasant mass of oddballs out there who are anti-science.
Perhaps they actually rather enjoy her talks because they get a feeling of self-congratulation for being part of a profession that stands up to the demons of anti-science, a sort of solidarity with the brave doctor fighting the forces of darkness in order to help the suffering. I can see how easy it would be to be inspired...
I'm certain she wouldn't dare to present the same talk to the IiME conference or the International ME/CFS conferences. I wonder whether she'll do it at the CMRC conference. I hope, if she does, there will be people there to call her bluff.