That seems overly dramatic. Yes, you can retire in your 50s (or 30s-40s with a good paying job) and stop working. There is always plenty to do in this great wide world that we live in if you have even a modicum of imagination.
That's the beauty of being FI anyways, if you want to work then work. If you don't want to work then don't work. Simple as that.
This isn't rocket science, workaholics.
My wife once talked to an elderly lady that was working in her 80s because she said she had nothing to do, as she had worked all her life in multiple jobs.
I guess imagination gets eroded when you are conditioned to be a wage slave for too long.
Edit: all the constant activity (always had hobbies on the side too) has kept her in good physical shape plus decent diet and she's Japanese. Definite oba-tank who will probably soldier on well past 100.