She clearly doesn't understand how BBC News is primarily consumed.
I don't think there's any need for this kind of comment, I find that pretty patronising. I would think the Head of BBC News would have access to substantially more information about how the audience consume and feel about their output than some people on the internet having a bit of a reckon.
You would think the Head of the BBC News would know what they're doing, but then again You'd think the President of the United States would know what he doing as well!!
Just because someone is in a position of authority doesn't mean that they know a lot about their subject, even those that have been doing the job for years. I learnt this when I was working on a Radio Station in my early Twenties. It was an eye-opener as those towards the bottom of the chain had a lot more knowledge than those towards the top.
Those that show huge respect to such figures, either know them personally and they've proven themselves to them, or in the Majority of times, those that run to defend them have no real-life experience of the person being praised.
Over the years I've worked in various industries but none beat the Media and Politics when it comes to those that are in charge with very little real Knowledge. Often the Man or Woman off the street (or indeed the internet) would do a better job,
I will say this however, those in higher media positons are excellent box tickers.