Something to consider about the statistics for coronavirus is who is being tested. In my area, we are only testing those who come in very ill, so they are needing to be hospitalized. We are not testing those who have minor respiratory illnesses the way we test people for the flu.
So we really don't know if the coronavirus is deadlier than the flu, and most probably it is not. People are not going to their clinic with a cough and then getting a nasal swab for the coronavirus. We don't have very many test kits and are only testing highly suspected cases (travel out of the country or known exposure, plus a respiratory illness).
If we only tested people for flu who were already seriously ill, we would think the mortality rate was much higher. For example, if we admitted four people to the hospital with serious respiratory illnesses, they tested positive for the flu, and then two of them died, the mortality rate would be 50%. The reality is that most people who test positive for the flu do not get hospitalized, and our testing people who are not hospitalized leads to our knowledge about the lower mortality rates of flu.