The press aren’t upset that Kamala Harris won’t tell us her positions on a dozen or so topics of interest to the nation. Their rationale: we know where Trump stands and we hate it. Wherever she stands is likely to be better than his views.
Beyond that, we don’t need to know as whatever she reveals will alienate at least a few voters. It is a strange view for a journalist to take, but an entirely reasonable one for a rabid partisan.
I conclude most of the mainstream media are in fact “rabid partisans;” they no longer meet the minimum criteria for journalists. Furthermore, they are proud of their commitment to values they mistakenly believe are more important than knowing and sharing the truth.
In this sort of situation, pundits like to say “They only had one job … and failed to do it.”