Its a double edged sword. If he tells high number it might be creating panic among people. If he tells low number you might feel deceived. I remember Trump earlier talking about million plus deaths. But the figures kept changing based on different models, I guess. Models can only give indication but the true picture will be painted over a period of time only.
What more important is to follow the social distancing guidelines and the suggested hygiene practices. Ultimately life is in your hands (in the absence of vaccine)