Sure, Murray was entertaining - I suspect that's what his employers wanted and liked about him - and that's a part of making sport enjoyable and interesting for viewers, casual or knowledgeable ones. I don't for a moment doubt that Murray was, and remains, both an enthusiast and very knowledgeable about motor sport, but I don't think he was every likely to convey the full extent of his knowledge in his commentary. For one thing he wouldn't have had time left to describe what was going on, which was his main job after all, and also he invariably had an 'expert' (Hunt, Palmer, Brundle) alongside him to provide analysis and the drivers-eye view of what we were watching.