Retiring early gives you more time and energy to do the things you’ve always wanted to do, like travel, devote time to your hobbies, or spend more time with the family.
You can still start a new career. If you have always wanted to start your own business then retiring early can be ideal. Starting a bit younger than after the actual retiring age will benefit your future business since you will have an early head start.
An early end to the day-to-day grind and work related stress can be good for your health and may actually increase your life expectancy. You can now take that grand vacation early while you still have the strength and good health to do it.
Since nobody can really predict how long their lives will be, you are better off getting the benefits at an earlier age.