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.
I've NEVER liked sports gambling because it's so hard to predict and I also believe that it's rigged by Vegas and the Mafia. The NBA has already been outed as rigged via referees and the insane actions of refs in last year's Super Bowl by ignoring obvious penalties makes it even worse. The games are obviously tainted as this point. And the fact that none of the leagues want to implement rules that correct wrong penalties only solidifies the fact that they want these things to occur.