No, they don't. But healthy people can determine the risk factor of getting sick. They can set aside money in case of emergency. They can choose to pay out of pocket.
Yes, the person hurt in the accident or the person that comes down with cancer etc...
Yes, it does cost a lot and yes, they are taking a risk (as wacko pointed out) that if they are unable to pay, they are going to get hit on their credit and likely be forced into BK. But again, the vast majority of people in their 20's are not going to need insurance unless they are unhealthy to begin with. The catastrophic does not hit very many of us health wise early in life.
Not necessarily invincible, a person can also know that statistically, the odds are greatly in their favor in their younger years of not needing it. Obviously this varies by individual depending on lifestyle choices etc...
I would love to see the data you are using to justify the above.
The health insurance side of the business is pretty damn predictable in terms of profitability. Again, that is not personal responsibility. You are taking away the personal responsibility and forcing the decision upon the individual as to how they choose to pay.
Except that it really doesn't. How does it help the poor? One catastrophic accident and they are still going to end up in BK. $10000 or $10000000... doesn't matter, they cannot afford it.