Not sure your logic that a politician or potentially leader needs to know how are system workers in order to buy it for a country or a country to use it. That is why they use experts. Also maybe she should have got someone else to speak about it, however I can imagine they wanted to speak to her not some random.
Also despite her often tongued moments , I can think of a few times she has had these moments. She is a rather clever accomplished woman that does know how to talk too and for the general public. After Boris, Starmer and now Burnham I do find that refreshing.
Feel free to disagree with me but don't suggest I should shut up