Earlier quoted context omitted.
I think it is cost scale. Get cancer? That could be a million dollars in treatment. You need insurance. Get a bad tooth? Maybe 3k max to replace it with a bridge or similar. The idea is most people can scrouge up 3k but not a million bucks.
> The idea is most people can scrouge up 3k but not a million bucks. The reality is far from that, though. Roughly a third of the citizens of the US would have to go into debt to secure $3K on the spot, they don't just have that laying around in the bank. Doing so could easily cause a downward spiral where one would have to choose between basic necessities or moving back in with family for months or even years to pay…
That doesn't change the nature of the problem.
With catastrophic events, one person in 250 will incur a million dollar expense in a given year, so everyone pays four thousand dollars a year for insurance and that person gets covered.
With dentistry, one person in five will incur a $3000 expense in a given year, so insurance would have to be $600/year. It's completely useless. If you couldn't afford the loan payment then you couldn't afford the insurance.
Insurance only works for things rare enough that most people in the pool will never incur the expense. If the event is common then it isn't insurance, it's just a prepayment plan.
Insurance never saves money, it only pools risk.