You could say the same about any breed of dog realistically even small dogs are a risk we had a small dog pts in the 70s as it wouldn't let anyone near the baby and bit the person who did
Any dog could turn, yes. An aggressive spaniel could snap at a child and bite them on the neck, injuring them. If you were incredibly unlucky, the teeth could catch the child at the worst angle, reaching a major artery and causing a bleed/possible death if you can't get to a hospital in time. But that would be incredibly unlikely.
If an XL bully snaps at your child and catches them on the neck, they will hold on. They will lock their jaw and hold and increase the force whilst their sunken in teeth rip through arteries and flesh causing more and more damage until it's game over. Your kid is dead.
The numerous videos of XL bully attacks where they've latched onto a person's arm or leg leave me cold. The only reason these people are still alive is because they had the blind luck that a limb was closer to the dog than their head or neck. Because if it had been their head or neck, they'd be dead.
Pit bulls and their crosses don't bite, they latch on, exert force and cause horrendous damage. Comparing a 'normal' dog bite to an XL bully bite is like comparing cutting your arm with a knife to sticking your arm in a blender.