People don't die due to lack of insurance, its not a cause of death. People die from illnesses, many of which having insurance wouldn't fix anyway.
Insurance is great when you need stitches, or break a bone etc, but in the case of major illness, even with insurance it often results in bankruptcy (there is a topic here about this, something like 75% of medical related bankruptcy cases are people WITH insurance.)
The plan is to not get a major illness until you are really old, and then the govt pays for it, but so many people have insurance that only covers so much, that in the event of grave injury / illness / debiliation, it still ruins you (if it doesn't kill you)