The Camera doesn't show any rear vision and there may have been traffic moving and coming up faster in the rear.
Therefore that is the best decision to make.
I hope people like you need police one day, and change your mind when things don't go as planned in your perfect world.
Police do a good job, and at times lay their life on the line, it's only people who usually have fallen foul of the law like a recent speeding ticket and or have been charged with drugs or drink driving who are carrying a biased opinion because they feel they have been picked on, tantrum school yard stuff. Most normal Mature people in society would agree with my opinion.