Agreed on that. Though in the scale of the UK there aren't that many cases. The ones there are however, are (deliberately) high profile. It has a chilling effect on the population, without needing to use it much.
They also hamstring the bobbies via the budget assignments. I know a lot of forces would love to get rid of some of the more overtly racist/sexist/other-ist officers. Their budget limits wages however, which limits the selection of replacements. They end up having to try and weed out the ringleaders (to fire or retire) and split the followers up.
The long and the short, most of the police are working class and do the job to try and make our country better. Some are even trying to counter the bullshit rolling down from on high.
You know you didn't know about the loop initially. Therefore, something you did without that knowledge caused it. Making changes, based on the new info will change the outcome to something different.
You wouldn't just turn around without cause in the original loop. Doing so, with your only reason being the new knowledge will change the outcome.