My brothers friend got a rottie as a puppy....took that dog everywhere with him in his truck. Then one ride, when he was about 7,,,he snapped and attacked the owner and ripped up his arm while driving. The dog was destroyed.
Neighbors had a rottie; she was a sweet girl. Then one day she wasn’t around. Turns out she got agressive (and these people had a little girl in the house). Fortunately no one was hurt AFAIK, but the dog was put down.
Large dogs cause large problems on occasion, no denying it. But the devil is in the details as they say, and I’d have to know a lot more about the specifics in the incident you related here.
I can only say my Rott/Shepard mix has been magnficent in all aspects. Then again, I recognize she’s a ‘work dog’ and treat her as such. She’s not ‘cuddly’ except with me, for exmaple.
Irks my wife a tad....(chuckle)