A well-packed box of eggs can withstand the bumping "bruising" of the sorting machines, handlers, and trucks. But they can also withstand the cooler or warmer temperatures for a while longer than baby chicks. And usually it's the temps that kill most of the chicks. People always want to add more chicks for warmth, but the ones on the outside of the little pile will still be cold. Plus the same movement that might "scramble" an egg, can still break the yolk sac on a newly-hatched chick.
Eggs just need to stay above freezing until they are incubating. Otherwise, they're good - as long as they are packed well.