They're only as good as the training
Winston, our 4yr old male Boxer is brilliant with the grandkids, loves the grandaughter (17months), soft as anything, but not many people come in the gate when he's outside.
Max our previous male, was a brilliant soft dog but hated other dogs mainly because they always seemed to go for him. Still he was very well trained and his aggression to other dogs was trained out of him but if attacked he would retaliate.
Millie, our previous female was big by KC standards, as was her father, broad shouldered, strong dog, but so soft it was embarrassing lol. That's where Max came in and balanced the pair.