There is one good argument that hurts pits.
Some 90% of dog-related fatalities in the US are caused by pits.
It's not because they're "more aggressive", it's just that they are stronger and deadlier when they do attack.
Just like with pythons, there are thousands of bites to people, but most are from small baby snakes and aren't more than a pinprick.
However I still do not agree with breed-banning of any sort.