Plus, I have difficulty in understanding whether an elderly's 'experience' would have a significant addition to quality of coverage in a field so unstable and ever-changing as politics apart from what standard critical writing already achieves. Aren't politics and related dynamics drastically different today, in the internet age, than those the senior, experienced editors are used to living in?

The long and short of it is that no, politics are not drastically different. It's a thing of basically every generation to think the world is significantly different than what the last generation will understand. Suffice to say this is usually not true in the broad strokes, which is really what matters.

If I can already have this moderating insight, imagine what someone twice (or maybe even three times) my age would be able to see. They'll have an overview of history that you (and I) in your naivety simply do not have.