I don't think she's being unreasonable in not answering the question, but I do wish that politicians weren't so afraid of being honest in general.
If, for example, Theresa May had answered, "I would probably vote remain again but as I see it the people's will was, and still is, to leave the EU and as Prime Minister I see it as my duty to carry out the democratic will of the people", then isn't that what people say her position is anyway? Why not say so?
Oh, and as a logical follow-up to the inevitable question of whether Prime Ministers are meant to do the best thing for the country, rather than blindly follow the people's will, perhaps an answer of, "I thought on balance that Remaining in the EU was the better thing for the country but that's absolutely not the same as saying that Leaving is necessarily a disaster regardless of what we do. We can make it work and that is what I intend to do to the utmost of my ability."
Well, that's how I see her position, anyway, and that's how it's been sold by some on here. I don't know how true that is to her or not but then that's rather the point. Dodging hypothetical questions is reasonable to an extent but even not answering is itself an answer. Politicians shouldn't be so afraid of the truth is all, and I wish that changed, but it's not really May's thing personally.