"One died from car accident.Since the life of man is priceless thus the driver shall pay nothing."
The difference between worthless and priceless.
The life of a man is valuable and of great worth.Thus the driver shall definitely pay or else the life turns out to be worthless.
Meanwhile,life of man is priceless,which means that any price (compensation) cannot fully compensate.
The driver shall pay but it can never fully make up for the wrong he's done.This is tragedy.