By age thirteen, seventy percent of kids drop out of organized sports, and the biggest reason they cite isn't losing, it's that the games stopped being fun because adults turned them into clashes. That's the real cost of your framing. The 2008 final was great, sure, but it was great because Federer and Nadal respected each other, not because they saw each other as enemies. A contest can have drama, tension, and excellence without the hostility. When we sell sport as a clash, we get Heysel and parents screaming at refs. We can keep the edge without making it war.