I'm going to generalise a little bit from your statement about sports: it is dangerous to disregard the body (Sports) and focus mostly on the mind (Where things that would allow someone to excel in CS are). You don't need to be a sports star. Even just someone who exercises casually or plays sports socially.

Someone's physicality (Let's move on from just thinking about sports only) can/does have relevance to someone's aptitude for CS, or, their ability to do well.