Elizabeth Warren wants “Medicare for all public option.” Pete Buttigieg wants a “Medicare for those who want it,” another public option. Bernie Sanders will push #MedicareForAll legislation in his first week in office.
Periodttt. I’ll stick with the guy who hasn’t faltered. 
You can’t opt out of her plan btw. Whether you like it or not. Again you’re misinterpreting it. Everyone already pays for health insurance whether you have it or not. Through taxes, fees, etc. You’re just not covered if you can’t afford it. Under a single payer system you are.