I agree but we’re long past that already. Seat belt laws, bike helmet regulations, etc. Local and state governments especially already mandate all sorts of building codes. You’re not wrong, but that train has already left the station.
I do not believe wearing seatbelts can reduce accidents. If you are crashing at 70 MPH without the seatbelt, the only person you will be killing is yourself; again, darwin award right there, so no harm and no foul.
If, under very rare circumstances, should your ejected corpse theoretically hit another person and cause injuries or cause damages to property, then it might be a case for the courts.