If you're that ready to "determine the duration of your life," then you can do it yourself, without a publicly funded and legally authorized program to help you. Require anything more than you and your own devices, and you're not really as individualistic as you think you are.
That's what people who think that others are too stupid to determine the course of their own lives think.
Anyone and everyone who thinks that I am not ready or able to determine the duration of my life can go fuck themselves.