Then of course there's the daytime and entertainment brigade which prefers the unthreatening anodyne gay male like Schofield or other similarly neotenic subtypes like Ant & Dec.

Neoteny is the "retention of some larval or immature characters in adulthood" Note that all three of these (like so many others) were promoted from childrens TV where they had been clearly chosen for this very characteristic: they were adults who appeared childlike, so they could: " get down with the kids"...

Children's TV has thus been effectively used as a training school for adult TV, disciplining presenters in the art of remaining completely unthreatening with uncontroversial opinions who at worst will revert to mere puerility.
Trained in the anodyne arts and thus schooled at keeping the Overton window within the bounds of the uncontroversial, the media finds them very useful which is why it retains so many of them. Hardly surprising when the aim is the juvenilisation (or indeed infantilisation) of both the subject and the audience itself.