Reaction to "You can encounter many defeats, but you must not be defeated"

Why? Why must one not be defeated? As if our overly competitive society didn't delude us enough.    Throwing around lose ultimatums  like this I find just to be a cheap way to get writer's brownie points.  I firmly believe that one's goals tell a lot about a person, and if ones main goal is to be able to lose but not give up is not the wisest of options.  Every person should strive to be happy, and if being defeated ensures that happiness then so be it.  Win or loss one should just be happy, because life is too short to be sad.  And life is way too short to not play devil's advocate.