But a much easier argument against sports betting is that it ruins the sports. Players throw. They get good at subtly cheating. The gambling apparatus latches itself to the sport, to the teams and players, the umpires and judges, the sporting organizations. With this much money on the line, it's not a matter of if but when games are thrown, cheated -- the bigger the game, the bigger the incentive. It's even easier now because of the amount of side/parlay betting that is available. It exhausts the spirit of competition.
Sports gambling is diametrically opposed to sport itself.
It ruins lives, funnels money to terrible people, makes sports worse for everyone, and has no positive impact on society. The benefits of the "freedom" to let manipulation of your lizard brain drain you of your past and future earnings is not worth it.
But if you really think about it, yes there might be a tiny portion that wins overall, but they only win because there are a lot of people emotionally invested that ruin their lives. So yes, please ban.
Edit: While yes, it can be fun and I personally can have a lot of fun when I put 50 bucks into a slot machine once or twice a year, no matter the outcome, it doesn't really justify to keep that business alive
Probably explained by chance.
Gambling "systems" don't work unless there's a flaw in the game.