If you fly your life might well be in the hands of air traffic controllers who have been up all night.. If you have to visit hospital with an emergency, you may be operated on by a doctor who has worked twice as hard as any pilot or controller..... There are plenty more people in the world who manage their working hours without being unduly fatigued - I did it for nigh on 40 years. It's just a matter of managing one's life appropriately.
Thank goodness the author of these words is now apparently retired.
Such people who manage to run such perfect lives would never be able to understand how the imperfect rest of us make mistakes for reasons of fatigue or otherwise!