Not necessarily, as another commenter said they need something "fulfilling" to do with the rest of their lives. After you've been working for 50-60+ years, 5 days a week, 8-16 hours a day, and then you suddenly have every day free you don't know what to do with the time. I've been unemployed a few times for a year at a time and after about 3-4 months it starts to get pretty boring.

My uncle lived to 100, he was completely healthy at 98 and would walk a mile or two a day around town, but broke his hip, the recovery process is practically what killed him because he could no longer be active every day. For like 6-9 months he just sat around, he's muscles and mind atrophied, and the rest of his body started to "fall apart", and he was never the same. He died about a year later.