If all you have (for both worldview & skills) is a hammer...
> One of the arguments the case makes is that, without the motor, the girls wouldn’t have been on the top of the hill in the first place.
If you don't believe that kids (ages 11 & 12) can get a bike to the top of a hill, with the thrill of a fast (exciting, dangerous) ride down the hill as inducement - then maybe you should not be allowed to be a parent. And it's not like the parents involved were magically ignorant of the existence of a steep hill in the area.