Yeah the system is not the best. I still claim that an experienced crew can drop supplies to a person in the water---once you understand if you have to drop up wind or downwind, it is not a problem.
I dropped about 15 life raft packs during my time---all made it to their target. Even talked a cessna pilot down to a successful ditching in mid Atlantic---he climbed out the window, onto the roof and was picked up by the tanker we had him ditch next to, without even getting fully wet. He was doing a solo ferry flight and his fuel pump failed---he had fuel on board in a bladder tank, but no way to get it to the engine.
Also found my fair share of idiots who chose to row across the Atlantic in row boats---now these are the ones who should be charged for their search and rescue, but that's another thread.........................