Gee should I buy $5-10,000 of useless insurance to remain in Thailand even though most policies don't cover cancer, eliminate the coverage of most medical problems if one has high blood pressure or some pre-existing condition. The insurance is basically useless once you reach 70+ and increases for every year you age. With the amount you pay for insurance, one could buy a condo in a smaller town in most Western countries. The amount one saves by living in Thailand is negated by the insurance cost.
Solution? Move back home when Thailand requires health insurance since most countries have free healthcare and no requirement to buy bogus insurance. As a previous poster said "This is no country for old men" despite what the fake news says.