It's difficult to discuss a story such as this without sounding callous. My problem with the lawsuit is the parents are accepting zero blame for the death and injuries even though "they should have known" that the girls were too young, too inexperienced to ride an ebike under those conditions. Even a regular bike could have been dangerous to ride on that hill with two kids on board.
When I read about people crashing and getting killed or injured on these bikes I have to wonder how much experience they had riding any bike since they were kids especially with the boom in bike riding due to Covid. My guess is, many adults that rushed out to get a bike hadn't ridden one for years, and while they remembered how to balance, forgot the basic rule, don't grab that front brake.
This is especially true with today's modern disc brakes vs the old rim brakes most of us grew up with. People panic, and immediately grab both brakes, front wheel locks and over the handle bars they go.
In regards to these girls, I understand there's been talk of the front wheel coming out of the QR. I don't know if the QR was determined to be the cause of the crash, but I doubt they could prove whether it was properly tightened or if it was a design failure and the child grabbed the front brake in a panic causing it to rotate out due to improper torque on the skewer. One article I read that the brakes didn't work, is that the fault of RR, or the fault of the person that assembled it? Do the parents share some of the blame by allowing their child on a bike that wasn't properly tested to be safe?
All of this is/was left up to a jury to understand at trial, many member of the jury probably haven't ridden a bike, nor understand the technical aspects. It's all presented that young kids got killed and injured the the company with the deep pockets has to pay. We certainly can't look the the parent that lost a child and hold them partly to blame for allowing them to be on a bike in an environment they weren't experienced enough to ride in.