[ksenzee]

Yes, except imagine your ticking time bomb set to go off 40 years before everyone else’s.

[isk517]

Also, it doesn't kill you but will make you an burden to all of your loved ones.

[sfn42]

Eh, if i start having symptoms I'm out. I'm not wasting away for decades being a burden to family and society. Rather just get it over with.

[woleium]

I used to think this way too. Now I recognize I was naive. It's a gradual decline, and once you get to the point that you are no longer providing any value, it's probably too late to take yourself out.

[gwern]

That requires decision-making and rationality of the sort that OP shows may be some of the first things to go.