I guess you didn't make it to the last lines. " Wildlife experts said the aerial dumps are a more effective method of stocking fish than transporting them by ground since it’s difficult to maintain the animals’ oxygen levels in packed tanks for long distances. “Post-stocking netting surveys show that survival of aerial-stocked fish is incredibly high,” the agency said."
It is incredible considering that untrained human divers would suffer traumatic injury or death after a 30 ft. dive.
The chances are, many of those fish hit the water head first and made no splash, like the best Olympic divers who do the same thing. Not to mention, they do not have flailing appendages that can get ripped off, plus low surface area. All it takes is one male and one female to meet at a seedy lilly-pad, and Bob's yer uncle. They're fine.