OK, it was definitely a weird conversation.
* For the entire 30 mins I was in there, she spoke breathlesslessly. I'm quite sure she was trying to keep me from saying much.
* Her arguments boiled down to three. (1) We don't know much about cross-sex hormones because they haven't been heavily studied, but we do know that hormone therapies in general are very dangerous. (2) Large portions of the body are intended to work with the hormones that pertain to the body's sex. The effect of the opposite sex hormones on them will cause them to operate differently than intended. (3) The dose of hormones required to reverse existing hormonal levels are necessarily high (I mentioned blockers. She seemed to think they introduced even more "danger").
* Regarding Ms. Jenner (whom she consistently deadnamed and misgendered), she said she was referring to probably steroid use and not hormone use. I asked whether she had information on whether Jenner used steroids. She likened it to Donald Trump being shady (interesting comparison) - no direct evidence, but probably pretty likely.
* She kept coming back to "I'm a scientist. I try not to take a position on social issues, and just focus on scientific knowledge".
* She printed out two studies that purported to show that HRT was dangerous, one from 1989, and the other authored by our Good Friends At Johns Hopkins University in 2003. She later emailed me a third one from 2011 that found that FtM HRT was completely safe and that in could not conclude that MtF HRT was dangerous.
So most of what she told me boiled down to fear, uncertainty, and doubt, but there was no way I was going to talk her out of it. Based on her general defensiveness, I got a sense that she knew she had done a bad and was doing her best to backpedal.
The most helpful exchange occurred near the end, where she talked about "a guy my husband was close to" who is now a transgender woman. When she persisted in using male pronouns for her husband's friend, I insisted upon correcting her. She went into a speech about how the way you present has nothing to do with whether you're male or female. I made a point to remind her that she may have transgender students or students with transgender friends and relatives, and hearing a transgender person misgendered would be upsetting to them. Not sure she got it, but perhaps will give her something to think about. By the end of that discussion, she had starting saying "this person" instead of "he".