Well, here I am at age 60 and never thought I'd last that long- military, airplanes, aerobatics, police work, car racing, etc. I don't have any kind of death wish and was always very careful about those activities, maybe that's why I'm still here. Or just lucky.
When I was 20, I said "Shoot me when I turn 40."
When I was 40, I said "Shoot me when I turn 60."
Now I say, "Shoot me when I start to lose my marbles or my mobility." (DW would say the marbles rolled away 30 years ago)
My point is that regardless of what we say when younger, most old folks still desire life over death. If you have provided for your care when you can no longer do it yourself, then that gives you much more freedom to choose.
It's one thing to say "I want to end my life because my physical/mental condition is unbearable", quite another to say "I want to end my life because I can't afford the help I need."
Some of us have philosophical or religious prejudice against suicide, others develop those attitudes later in life. You need to make the financial preparations sooner so you have the option for philosophical/physical decisions later.