I'm struggling to find the logic here, maybe I am an idiot.
Step 1: There is an incident at a Merlin park, caused by incorrect operation of a ride. This ride has restraints.
Step 2: Merlin's solution is to apparently reopen said ride the following season, but close a trio of rides that are completely unrelated, have had no serious incidents, purely because an incident MIGHT occur which will almost certainly bare no resemblance to the original one and the ride doesn't have restraints despite many other attractions in the park also not having restraints and any incident caused by the lack of restraints will almost certainly be a patrons fault (unlike original incident) I just can't see it being a health and safety thing.