Over the top Health and safety is a health and safety hazard, as it can lull people into a false sense of security, devalue the need for genuine protective measures/control measures as people will just write it all off as 'elf n safety gone mad' even where you really do need it
This is very true. Good preventative / in-built H&S is a fantastic thing that has saved a lot of lives and had a lot of progress in the last few decades. But ad-hoc H&S, arbitrary or overzealous restrictions give it a bad name and really do often achieve the opposite in the long run.
Plenty of stories about firemen casualties because they now wear so much PPE that it's now harder to sense where the heat actually is and take the right precautions, or to be on full guard. "Too much H&S being more dangerous" might sound silly to some but it truly is a factor, or confusing and unnecessary H&S acting as a distraction while the problem itself continues.
Unfortunately from what I experienced with Merlin they are very much of this camp when it comes to reactionary measures. The fundamental stuff is good, but beyond that it has always been a case of add signs, hire a new manager to say the same things, say a slogan, or slow processes down arbitrarily. It massively confuses and misleads the staff on the ground too.
For example on a particular ride at a particular park, there was a very obviously dangerous and overcrowded exit which was being used for many purposes it had not been designed for. Should there need to be an emergency evacuation, it would have been total chaos. Because the exit was so overcrowded, guests were constantly backing up on to the moving platform while trying to exit. Should the very flimsy wall next to this very crowded narrow path collapse, with all the people leaning on it, you'd have many people exposed/falling into an active ride area. It seemed so easy to redesign the path/station for the purposes it was now being used for and create an efficient system, but instead the basic issue was ignored, a random sign was added and the official advice was "slow the ride down if it gets crowded", ridiculous.
I hope that the right approach is now being adopted. I think they've taken the right precautions with the rapids at the moment - turning the waterfalls off might seem a little unnecessary but as has been pointed out, it's a high pressure time and hopefully they will return.