Question

Most people prefer to pay health insurance premiums rather than pay out-of-pocket for medical expenses because

people are cautious and believe they are less likely to get sick if they have health-insurance coverage.
doctors and hospitals always provide better care to people who have health insurance.
people still feel more secure with a health insurance policy, even though out-of-pocket costs are often lower.
medical costs can be extremely high, and insurance is more affordable than paying out-of-pocket for a hospital stay.

Answer 1

medical costs can be extremely high, and insurance is more affordable than paying out-of-pocket for a hospital stay.

Explanation: people buy insurance to pool and transfer the financial risk of rare but very expensive health events. Risk aversion and potential catastrophic bills make paying a predictable premium preferable to facing uncertain, potentially ruinous out-of-pocket costs.