I've always explained it to friends like this: You're a professional baseball player. The team has never seen you play, but asks to see how many pushups you c

I've always explained it to friends like this: You're a professional baseball player. The team has never seen you play, but asks to see how many pushups you can do in a minute. Then sees how good you are at jumping jacks. These things test your athleticism to some degree, but really have no bearing on how good of a baseball player you are.