Health "insurance" in the U.S. is largely just health care paid by a 3rd party, which is inherently more cumbersome than paying for something yourself. If have say $1 mil in stocks your net worth bounces around $10K per day as stocks rise or fall 1%. You don't expect to be insured against such changes, and similarly you should pay at least the first $10K of annual health care expenses yourself. Your health insurance premiums would fall commensurately.

If you expect a 3rd party to pay all your health care costs, expect paperwork, since the 3rd party needs to guard against fraud.