Are pitbull owners just bad at raising dogs?

A disproportionate number of dog attacks, 66% according to this source are by pitbulls.

However there are people who will insist that it’s how they are raised, and and it’s not a genetic predisposition toward aggression.
So if the argument “it’s how they’re raised” argument is valid, and the stat of 66% is correct,
are pitbull owners just worse at raising dogs than other people?

Please provide links to back up any claim you make.