I also saw my grandmother die completely out of her mind from Alzheimers and saw my grandfather die of cancer. It got another of my friends too, a guy my age.. He was incoherent on drugs at the end and just screaming in pain.
Now, rather than tell you anymore stories, perhaps you would be kind enough to simply accept that people die and that's that. It's going to happen to you too ya know.
I fail to see how sucking all the fun out of my life is going to benefit me, you or society as a whole in the long run.
If anyone of the above people would have died in an SUV they would be just as dead and, frankly, it would have been more merciful.
But honestly.. I would rather go out doing what I want to do, in my SUV, sailboat, motorcycle or whatever than die alone in a nursing home or in one of the other ways I listed.
Life is so short, I want to enjoy the time I have here and if it involves risk, then that's fine.
So be it.