As to their training, its a different type of officer now on the street. When I started this job over 20 years ago, you could ask a group of new officers in the academy "who has ever been in a fight?" and it was almost 100% of their hands raised. Now, when we ask that question, sometimes there are NO hands going up in the air. They have no reference point of violence or fighting outside of what they see on TV in many cases. Now couple that with VERY limited training time and there is still no reference point, no matter what an instructor says about tactics and techniques. But, I do agree with you that for the most part, cops do not get the adequate training that they need to do the job safely and effectively. Teach an officer how to fight/restrain/subdue a person properly and excessive force claims are going to go WAY down.
As my instructor has talked about many times. When you start your training, your fear/threat bar is very high. Its new and unknown, so there is that high level of fear about what to do, am I going to get hurt etc. The more training and experience I have, the lower that goes as I get used to those unknowns because I have dealt with them before. I don't revert to worst case scenario ideas every time. Anyways, I digress....