I've been hearing young and healthy people say this for my entire, fairly long, life. But I have never personally known an elderly or disabled person to kill themselves over it. If you find life worth living despite its hardships now, it's likely that you always will even as those hardships increase.
At some point it may be more than just hardship. 80+, paralyzed from the waist down, bedridden, bed sores, muscles atrophying, all of your enjoyments gone, your friends dead, dying, or lost most of their mental facilities, and you're completely miserable.
