I think there is a preponderance of apartment-dweller related pit bull atrocities because drug dealers often get pits for cred and protection, and drug dealers, for reasons I guess of mobility, don’t usually work/live out of homes.
I think you you’re discounting all the redneck, rural yahoos to at least somewhat balance that demo.
I agree totally that in affluent suburbia about the only pitbulls to be found are a couple of dogs in the local pound.