The impression I get is that the advice which was correct / actually mattered was provided by University College London and Whitty gave some seriously dodgy advice on herd immunity which was why there was a delay in doing what should have been done. Is he competent?
The current situation has meant that the language of science such as Herd immunity has met the world of political language. Which leads to this being taken totally out of context in turn mediated by the press. With little idea of what they are even on about let alone any facts then add in the SM factor and before you know it everyone becomes an expert and the next John Snow.