I think a VC funding you is a much better security against any of these events than health insurance being forcibly deducted from your pay.
That is the case in the UK as well. If you have a start up in which you have invested capital and suddenly can't work anymore that is a huge financial disaster. The state is not going to fund your business while you recover in hospital.
Also the medical debt is something you would only have if you weren't insured. Both US and UK have health insurance, the only difference is that in the UK you have to pay for it, in the US you don't.
In any case having a well funded startup is a far better safety net than a forced insurance.
Not for the average person
OP was talking explicitly about start up founders.