The whole issue literally revolves around #4.
I agree that #4 is the bigee.
I see #4 all too often among Pit Bull owners, as might be expected considering the attacks upon them and their breed.
Much like MJ smokers were put off by insane illogical scare tactics like “Reefer Madness” so much that they insist a major drug is absolutely harmless - the crusade against Pit Bulls has made many an owner reject utterly any suggestion that they own a large and aggressive breed of dog.
Even after the dog has proven it was aggressive - there is always some excuse - but rarely any effort to make sure such doesn't EVER happen again.