@trying2learn,
I think there may be explanations in this thread, which gives a reader a sense of Roberta over quite a while. It is worth reading, she is a mensch, a primary a2ker. This thread is only one facet of her, her choice of place to talk about medical stuff.
I don't mean to speak for her, Roberta wouldn't like that, able as she is to do that herself. I'm speaking for me.