I believe that we should all try to win when its a competition. To think different does not make sense. That being said, everyone deserves the chance to prove themselves, to see what they have. To test their heart. If you lose, you lose. If you win, you win. But ultimately to make a choice to compete is the decision of the individual.
A few years ago a man missing the bottom part of his legs decided he wanted to run the toughest sprint known to man (400meters is a sprint not a run). He not only competed but he won. He won regionally, nationally, internationally and became an Olympian. If it seems that someone does not “deserve” the chance to compete, look at yourself and say “why not?”.
If people compete on an even playing field with equal skill what is there to worry about? Nothing.