THEY WANT TO SEE PHOTOS OF WHAT THE CARS LOOKED LIKE AFTER THE CRASH!
Of course, if the vehicle you were riding in sustained significant visible damage, then this common misperception will work to your advantage. BUT IF YOU DON'T TAKE PHOTOS RIGHT AWAY, BEFORE THE VEHICLES ARE SCRAPPED OR REPAIRED ... then this dramatic courtroom evidence will disappear.
So make sure someone takes plenty of photos of the vehicles, from lots of different angles, as soon as possible. And don't assume that photos taken by insurance adjusters will be any help. Usually, they are taken at such distances and perspectives that the vehicle damage will look far less serious than it actually is.