One thing I know about statistics is that you can make them say anything you want to match your agenda. A pro-dog person could easily manipulate those exact same figures to paint a different picture.
The biggest issue I have with this sort of analysis is that you just can't compare reptiles and dogs. A dog is smart, and shows affection toward its owner (not all but you get the idea), despite what some people think, your snake isn't going to come when you call it and sit on your lapIt's apples and oranges.
Bottom line, is my ball python dangerous, no. Is your yorkshire terrier going to rip out your neighbors throat, no. Would a 20ft burm be a bad idea to let roam your house, uh yeah. But a dingo kept as a pet would be just as bad (especially since they like to eat babies)!