When Tina Weirather or Lindsey Vonn are on a mountain they feel free and inspired. The mountain, cold air, breathtaking views and the feel of powder and speed define their lives. They cannot live without it. They are part of a unique culture, and when they are forced to take a break they feel depressed watching others compete.
Same with snowboarders - or even more - as they are missing the entire social culture and lifestyle associated with the sport. They breathe with their sports, it gives them sense of living and fills them with energy. There is no burnout.
I would think it should be the same with skating - go to the ice early in the morning, feel the cold, being both an artist and an athlete. And then the lights of competition, glamour of performance, the people in the arena, the costume and the role. It must be intoxicating. I never did figure skating myself, but I can imagine it must be the feeling. I am a skier, I feel the mountain, it's my passion, but I can imagine it must be a similar passion on the ice rink. Both in training and in competition.
For skiers mountain is the home, for skaters it's the ice. Should be the same thing. The same energy and life force.
So where is the difference? Why doesn't it even cross Shiffrin's mind to take a break, while it's a reality for Kaetlyn and others?