A bit misleading, though I get your point. 2/3 of people who file for bankruptcy have medical debt, not that the medical debt was the cause of the bankruptcy.

Your assessment of this is incorrect.

The study I was referencing reports on people who specify that medical-related financial stress contributed directly to their bankruptcy. This was broken down by medical expenses and medical issues leading to loss of income - with medical expenses being the higher percentage at ~60%, and the combined percentage sitting between 65-70% (with overlap in responses).