But the way it's done is cooperative AND competetive. Competition is not destructive. Winning and losing aren't important.
Nothing is destroyed through losing.
What's gained is an appreciation of the sport through the pursuit of excellence. Yes, argument is fighting. Argument is not fighting. We can't go through life permitting others to make errors based on misconceptions, and I would certainly want someone to point out if I was basing my opinions on some misconception. Just as subtle, confusing to the victim, the result of the search for power and not the truth.