I'm going with my personal experience. The Alpha theory is not cr*p. Anyone that believes so , has never been able to master it. I've left two females home alone, ( a pit bull and a mastiff; a GSD and a Maltese). Ive worked 12 hour shifts. No crates, no separate rooms. They were asleep back to back when I left, same position when I returned.
And, yes. I would NOT ever own a dangerous dog. I don't care if the dog was abused or not. If a dog has bitten or is likely to bite in certain situations. No thanks. There are other dogs more deserving of a good home without endangering the public.
I'm not speaking of special medical needs. I'm referring to extreme, potentially dangerous behaviors. I've dealt with plenty of blind, deaf, lame etc. It's not right to own a dog that cannot be controlled.
Just because someone has owned many dogs, does not necessarily make them an expert.