Once you move to physical contact you've given up any advantage or possibly reason to have brought the gun in the first place.
This guy was already a known violent felon...probably know to be by the neighbor. He was committing murder and likely wouldn't have stopped with the babies. He received the sociopath treatment he needed.
The only thing I try to hit with my firearms are what I'm shooting at. As for going the Louisville Slugger route that first at bat better be a homerun a swing and a miss puts you into grapple mode with Mr Violent Felon.
Also most bathrooms do not offer a lot of room for a solid swing with a bat.
I have zero issues with grappling.
Some folks do and that is completely understandable.