This is exactly the point. Pressing the tit opens the hook and drops whatever is on it. If you have a bucketful of water on the hook, you don't want to drop the whole bucket as well. It requires specific wiring to release the plug on the bucket, not drop the bucket.
The wiring follows the sling up to the cabin; the crewman releases the water from the cabin. There can be no confusion, the person with the hook jettison switch, is not the person flicking a switch to dump water. If that's not the case, its your SOP's that are wrong, not the concept.
over the 1435 Q Shed ISTR
You have to get your kicks down there somehow.....