The alternative conclusion is that the guy in the sedan DID have his lights on but was driving too fast to see people standing in the middle of a flat, straight road.
Why do you persist in your assertions about the headlights?
YOU DON’T KNOW!!!
If you can not stop your car within the range of your headlights, YOU’RE DRIVING TOO FAST!
(Yes, even a stationary object!)
I’m not defending the spectators in the road!