Coming from a country with non-elected state attourneys and compulsory prosection the American approach to this seems rather weird. Wouldn't electing prosecutors essentially make them politicians?
So yes, they are politicians, and I'm not convinced that's a good thing.
Of course, being north of the border, I'm not exactly versed in American state politics.
Unitary executives and plural ones each have their pros and cons, but on the balance given the limited attention span of the electorate, I think unitary is better.