It looks like to me that they removed the rubrail to install it on the replacement boat. On a lot of boats, the rubrail is actually structural as it joins the deck to the hull.
I can't see what the damage was, they chose to hide it. Did you call the guy?
Looks to me that they opened it up maybe to inspect structural damage and it has not been fixed or reglassed . If the boat was damaged enough to be replaced I would not want to be in that thing going 70 plus mph. Roll of the dice.