Ventilators causing more harm than good in COVID-19 patients

Governments all over the world are scrambling to get their hands on ventilators. And that includes the government of Victoria which has 1000 ventilators, and has now ordered 2000 more to treat an expected surge in coronavirus patients. But are ventilators really the magic bullet in the case of this coronavirus? Or, are they in some cases, doing far more harm than good.