There is nothing in this world quite so soul crushingly painful as having your child die while doing something that the parent and perhaps people in general, consider to be 'safe.'
For me, it took some time to fall madly and deeply in love with my spouse, and to my surprise I developed that attachment instantly to my children. That same sort of passion that you would do anything to keep them safe, to help them grow up to be the people you want them to be.
When a child dies doing something that "should" have been ok, it creates a searing, wrenching, soul destroying since of loss and guilt and anger and pain. No waiver, no explanation of statistics, no explanation of preventative measures, nothing can salve that wound. And so parents, even ones of limited means, have been known to invest everything they have, time, money, energy, into making someone pay in the hopes it will make the grieving parent feel slightly less pain.
It doesn't make for less pain of course, only time and distance can mute the pain, but that can't be explained either because the desire to do something is irrationally over powering.