No reason. Howard Stern used to be somewhat newsworthy given his high profile and huge audiences on radio, TV, and even film at one point. But he all of that up when he went to satellite radio. Now he has a niche program with a small audience and he had more or less disappeared from popular culture. Now he's re-emerged on some talent show as a host which is the modern day equivalent of a gig as center-square on "Hollywood Squares". He doesn't matter.
That “some talent show” has the most viewers of any summer season. He probably has better exposure on that than on his radio gig.