Trump is a marketing expert. He knows he has the bullhorn, and he knows that using it reinforces everything he says, true or not. I’m surprised that the media seems to be going along with it, but I guess everything the President says is news.
In any case, I doubt we’ll never know the truth of the what happened in Iran: too many people have interests on both sides of obliteration and ineffectve. So I guess it’s better (certainly for Trump himself) if the public concludes that it was an obliteration.
Since June 2015, the media cannot help themselves.