Looks to me like they’re great dogs for owners who are strict with them and teach them discipline, so they don’t become liabilities. I met a former prison guard who had one. It had been trained by prisoners under a program for that. Very well trained.
I think the secret is socializing them to other people and other dogs/animals. They can sense fear in you and will react accordingly when needed without the attack training which is suitable for most non-LEO owners.