When I was child, our dog got hit by a car. The dog had two broken legs and was bleeding from the nose. My dad said, "Come with me son, I will show you what to do." So we went into the woods behind the house and dug a hole. I put the dog in the hole and my dad shot the dog in the head. After we filled in the hole my dad said. "Now you know what to do with me when I get old."
So my health insurance is healthy living, CrossFit, rapamycin etc. When that fails, I have a 9mm pistol I keep in the safe. I do worry about if I am somehow too incapacitated to use the pistol but not enough to die naturally. Infirmity scares me a lot more then death does.
There are all manner of health conditions that can occur that have little to do with your own healthy living, and don't incapacitate you or make life not worth living, but will cripple you financially.
You might end up with Crohn's or all manner of autoimmune conditions where patented biologics easily costs north of $100k US a year just in medication, but your quality of life if you find a medication that works is not particularly degraded from the average person.
CrossFit will not prevent you from getting into that situation, and I think it would be a vast overreaction to commit suicide in response to such a diagnosis.
I have buried many pets, but last year my wife got cancer and while insurance was a huge headache, it came through in terms of protecting our wealth. She's currently in remission a year later after a very, very difficult fight that she nearly lost multiple times. It was extraordinarily stressful. I learned not to worry about the insurance crap, it all eventually worked itself out despite how frustrating it all was. So I'm not sure 9mm, 45, 357, or any other caliber for the "Hunter S. Thomson" solution, would have been a smart move for us. I totally understand the sentiment, because there are fates worse than death for sure.
What didn't hold up was not our insurance but my employer, who found a sneaky way to get rid of me and not have to deal with an employee who needed to dip out for his wife's numerous medical appointments.