I was about to post along the same lines when I saw your thread. If WGT is really that concerned that the simulation follows the real world as much as possible, then being able to occasionally retrieve a wet ball is far more realistic than the current setup.
I'm sure an algorithm could be created that would handle this. If consideration was given for the likelihood of retrieval (percentage based on how the ball went in), then a button could appear for ball retrieval if the player owned one. This would certainly be better than loosing every ball that rolls into the water!