If a press conference takes place and no one is around to take notice, can it be said to have really happened? Sometimes the most interesting thing is the person saying the thing they did not mean anyone to notice. It was always thus with Brexit.
Time was when a press conference was a relatively rare event. Called only after diplomatic summits or when there was an important piece of news to be announced. Now, though, the format has been so downgraded it is being used for when any politician needs some attention. When the feeling that no one is listening to them becomes unbearable.