Respectfully, "gentle parenting" (as known positive reinforcement in the dog world) absolutely works. Well trained dogs are not trained by force. And I'd place a high stake bet on the fact that those dogs that attacks kids/people are not trained with positive reinforcement, but rather with force. That + the fact that XL Bullies are poorly bred of course.
Now, positive reinforcement doesn't mean permissive, it's just means rewarding desirable behaviours, ignoring bad ones and, crucially, setting the environment to avoid those undesirable behaviours to happen in the first place, the nature of a dog being that they'll reproduce behaviours that they're rewarded for.
Not letting a dog alone with a kid is part of "setting the environment" and its just common sense really.