You’re logic is flawed. That woman didn’t get hit by a car because she ate potatoes, she got hit by the car because either the driver was an idoit, or she was. In the hoveboard example, the kid fell off the hoverboard (because they’re so damm hard to control) and fell in the way of a bus. If it wern’t for the…

All of what you listed have also been around for a long while, where as “hoverboards” have only been around for a couple months.