Maybe the cars would see them if they were following speed limits, but of course let's blame driver who crossed the path of motorbike which was going only 50-100kmh over speed limit as it's standard at motorbike accidents with cars.
And I rode motorbike across multiple developing countries, not in luxurious enviroment of safe western roads, so maybe next time restrain from dumb assumptions.
Or they could just drive safely.
Also more lights = more visible = safer, wow, would have never expected that... I wonder how much cost this research and who paid for it.