Anecdotal evidence only supports your argument in your area.
Go to any 'rough' area and find the people who do not want to interact with the police and would rather solve issues themselves. These are the same people who weaponise dogs and do not treat them kindly.
A vicious Yorkshire Terrier is not going to have much success at tearing your throat out where a Rottweiler would. I believe in taking away the risk and not leaving it to chance or bad ownership. Service animals are the exception as they serve a greater purpose. That's just my opinion on the matter entirely.
Problem is owner not the dog then.
Down my road there is a pommie, its the most aggressive and vicious little dick around, its always escaping and it comes running at you very intimated and essentially trying to protect its surroundings.... Whats the problem, the owner is the problem, dont want to go in to their problems and why they should not be allowed to look after kids, let alone animals. But this poor dog is outside all day, all night, not exactly given care or love nor is kept entertained or kept on walks.
Its been left to grow up by itself and do everything by itself, I imagine its just a very scared, bored and lonely. I nor anyone else can go near it without a risk of a bite, its never bit me, but its had some bloody good attempts.
Few flats down is one of the husky type doggo's, clearly well loved and looked after, it pretty much watches the pommie in the day being a loud idiot. It responds to its owners calls and frankly just sticks its head between fence posts to stare and look around, completely harmless even though I would say it weighs around 8 stone.
When I lived with my parents, we had 2 staff's that had a total of 14 puppies, we had 2 puppies returned though (many years ago), one puppy came back how it went and was a typical excited puppy and just wanted the love. The other came back aggressive, dirty and just not happy with life.
As stated before and again in this thread, its never the dogs fault, it is forever and always the owners fault.