Jack, maybe part of the reason is because those submariners were part of the silent service? Bomber Command even sent radio reporters (Richard Dimbleby?) on some raids. There was a greater immediacy to reporting, and some footage of the devastation caused, which was far less likely if a submarine sank a ship, likely the sub would be straight into evasive manoeuvres.
And of course, those RAF chaps were far more handsome and much less smelly than the guys in the boats
