Police training means more than just knowing how to use a firearm, it also includes knowing how to remain calm and collect when in a dangerous situation. Knowing how to properly asses risks, etc etc If you think you're as good at that as your average police officer(Most of which aren't even that good tbh) I think you're being delusional. What experience do you have in these types of situations? If a police officer wearing a bullet proof vest feels his life is at risk and makes some wrong decisions because of it what makes you think you, the guy without any sort of protective armor, who may be in a situation like this for the first time in his life, stands any chance to do better? There are far too many variables to take into account.