I understand you love your dog, and my parents owned a pitbull who was also half lab, in my early 20s. Sweetest dog in the world, but I would never allow her near my child when he was born or after. I told my parents lock her up or we don’t come over.
They’ve been know to maul newborns just sleeping or laying on beds or swings. There’s not more to the story. They can be triggered anytime, and they were bred for fighting, or killing wildlife like deer, bear, or lions.
I've had a number of people tell me that they've been very happy with their pitbulls and that they're sweet. I've never spent time with one, but I wouldn't want a dog that combines those jaw muscles with an unpredictable temperament. It just isn't worth the risk when there are so many other doggos in the world.