First - I can not comprehend how you could possibly have a charitable interpretation on the war point and how it might have a net positive. I'm not trying to be condescending or anything, I would like to hear a single positive for being able to make BTC bets on killing people.
Second - even if you are not one of the millions of Americans that give a shit about sports, there is still a massive fraud implications just by the existence of crypto prediction markets. All it takes is one bad call to changed the outcome of game. The Superbowl last year had over $1 billion wagered on it.
If I live in a country that is under threat of being attacked by U.S. it is nice to have a website where I can look to get a reasonable probability that the attack happens