I think there's a special magic in being able to choose what you do for work and how much you do of it. I'm one of those people that won't ever be able to do nothing. But the rat race is exhausting, with the 9 hour work days and traffic hour commutes, and time away from family, and boring useless meetings, and horrible nutrition because you have to work through lunch, etc. When you get home you're too burned out to enjoy what life you have left so you're just looking forward to the weekend. Always looking forward to the weekend. But then you have to cram all the relaxing you want to do in with all the chores and errands you also need to get done.
With retirement you can stay busy, but on your own terms. Take a job in your hobby part time. Volunteer at the food pantry. Write a book. Start dog walking for extra cash and exercise. Finally grow a garden that doesn't die. And take an hour for lunch that we can actually chew and taste and enjoy, lol.