I know that something which does not limit your financial risk is nothing I would refer to as "insurance".
Like I've said several times, now: call it what you want. Junk "insurance" policies do not constitute "insurance" to me. Neither does a base Medicare system which has a straight 20% co-pay. Neither puts a cap on your risk.
Car insurance does (although they will tell you what your max-payout/coverage limit is; you buy the coverage limits you want).
Medicare (plain) has no limit on what you'll pay, per my understanding from the Harkin Inst Roundtable. And they were warning people about that, because people THINK it limits your risks like regular insurance. So, assuming it works like "regular insurance" is a risky gambit for people, and the Harkin panel was telling folks that.
They were likewise warning people about the pitfalls of Medicare Advantage plans, which DO work like "regular insurance" policies. Don't be lazy and call everything "insurance", when they are very different animals, with very different assumed risks - that was their primary message, which I was simply attempting to convey to you and others here.