I think that makes sense. I am 100% a layman with this stuff, buy if the “AI” is just predicting what should be said by studying things humans have written, then it makes sense that actual people were more likely to give serious, solid answers when the asker is putting forth (relatively) heavy stakes.
Specifically it’s very possible to stimulate the vagus nerve, which helps regulate heart rhythm, with an exam like this. This is a known effect, but typically in the context of a possible adverse effect of some procedures (e.g. enema).