That's a bit of an exaggeration. Pedestrians are not automatically to blame in every case. Today we have rules governing the movements of both pedestrians and cars. There is no default winner. Pedestrians win on crosswalks and such, but not in the middle of highways. And even there the car is no clear winner. For instance, if both driver and pedestrian have earbuds in, society today would say the driver is the more reckless. In fact most jurisdictions specifically forbid headphones on drivers. None that I know of forbid them of pedestrians.

And 500$ is certainly not the maximum punishment. Vehicular homicide, negligence causing death, reckless endangerment, DUI ... even basic speeding tickets in many jurisdictions are far higher than 500$.