If you can't think of a way to spin it as bringing diversity to the incoming class, don't write the DS.
Can you claim to have learned what it's like to have a physical infirmity that limits your activities, and so have developed better empathy for the ill and disabled?
Well, yeah, of course I can claim that I've learned what it's like to have a physical infirmity (since I have one) and have a new found sense of empathy for those who are ill and disabled (since I shit like 8 times a day and wouldn't wish it on anyone). Is that type of reasoning sufficient for a decent DS, minus talking about my bowel habits? Perhaps more so if I play up the fact that I would like help those with similar illnesses in some way in my career? Or would that be better suited for a personal statement?