Considering how so many motorcyclists drive, and the fact that the parents forgave the student, I'm going to guess that what really happened is that the motorcyclist killed himself by driving recklessly.
Sounds like you've never driven on a highway where there have been motorcycles present. Or you are a motorcyclist who doesn't like to acknowledge that many of your fellow riders don't follow traffic laws very well.
I mean, consider the counter shit take: That motorcyclist could be driving much more recklessly without being in so much danger, if other people didn't drive around with mobile walls at 100 km/h...
You're arbitrarily assuming it to be a given, that dangerous cars are on the street, and shifting the blame to the person who is, quite by definition, the victim here.