Ignorance, when it comes to your health, isn't bliss. It's trouble. It's taking unnecessary risks and missing out on less-invasive treatment options that are available only when there's been early detection. While I'm a firm believer that our bodies, if left to their own devices, will try to heal themselves, I also know that stuff like cancer doesn't cure itself.
For me retirement means giving up. Half a life. The past dominates and the future is lifeless. UNLESS, you take on a new project, something you've never done before. Something that stimulates you mentally and physically. Dancing (ballroom), Swing, Latin, Tango, language (foreign), art, musical instrument, Yoga (any level), cooking.
In some places around the world, it is possible to arrange good health insurance for less than $100 per month. In some places, the cost of medical care can be so low that it can make more sense to pay for it as you need it, rather than insure against it. And, in some places, health care can be free.