This is because the cartilage of your body protects your body for example if the cartilage on your arm goes away your bones would have bone spurs these are not going to go away considering the fact that cartilage protects your body so without this you would have tons of pain and possibly death since I am not a medical professional I can't go into depth about this but you would A. Die or B. Need tons of surgery and that would cost a lot of money or C. you would be in a lot of pain I will read more about this and come back with my final answer.
Essentially, these guidelines are there to protect the participants from harm/distress. Therefore, they are safeguarding the wellbeing of the participants.
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