A 2019 Harvard study found that 66.5% of all bankruptcies were tied to medical issues, due to high costs of care and time out of work. This includes an estimated 530,000 families. This study also shows that 78% of bankruptcy filers had some form of health insurance but not enough to cover their medical costs (CNBC). Even if you are young and healthy, you should at least have health insurance for what are called catastrophic illnesses. This includes things like accidents that put you in the hospital, cancer, and COVID-19. Because you are young and healthy, the probability of these events is low, so the premium is low.
Recent support for Medicare for all stems not just from the plight of uninsured people but also from middle-class people who have catastrophic illnesses that are not covered by insurance. With this model, the government can achieve substantial savings by negotiating fees and costs.