I wouldn't say fragile at all! It's such a demanding sport, a lot of these athletes are burning thousands of calories every day, putting a lot of strain on their bodies with jumps and spins, and all at the same time having to control their nutrition to keep their weight stable. All of that training, and often being in a constant calorie deficit, leads to these athletes developing injuries over the course of the season that they compete through. The same thing happens in a lot of high-level sports, but athletes just aren't open about it all the time. When you have a huge event like the Olympics, your training will be the most intense right before hand so you're in tip-top shape, but your body can't physically maintain that top shape for the entire year without getting seriously hurt. So, when all of these athletes come back from the Olympics, they are really tired from all of that intense training, competing a lot, and the emotional toll of being at the Olympics. This will usually happen at Worlds, and athletes will have a come-down period after the season where they can rest/heal up, but with the Olympic season, they then have to go to Worlds. It's really complicated, but these athletes are doing the best and pushing their bodies to the maximum, but like all humans, they have limitations. Like I mentioned above, all sports have something similar, but it may be less noticeable depending on the sport.
