yeah, they are meant for circulation, not collectors, they don't care how banged up they get at the mint during transportation, at the distribution hubs where they are dumped and rolled. just not their top concern, same reason they wear dies out before changing them. good is good enough for them.
pretty sure it's always been this way and more damage and mess as time goes on like when they upgrade machines for speed, or outsourced distribution to armored carriers instead of the Federal Reserve banks doing it.
I don't think it's about cost savings, as it is about speed and efficiency, just like they have a weight tolerance, they have an acceptable tolerance for appearance also I'd suppose.