The problem with assuming the police always behave impeccably until after an investigation, is that, one, obviously we know that they don’t. You would have to have lived in a cave for your life to have missed some of the most recent egregious behaviour. Even without that, no organisation is infallible. Particularly those that wield power.
But, two, this would mean that no critical (in both senses of the word) support would be given to people in the middle of a questionable, police involved, situation. We know that would leave many people in an extremely vulnerable situation.
Finally, even police officers I know and respect, and those that are staunch supporters of the police, certainly have pointers they give to their own loved ones, should they have police involvement. It doesn’t take a genius to understand why.
The feedback given in this thread strikes me very much as the patronising male, pat on the head, version. And we’re all a bit long in the tooth for that shit. A lot of us are mothers old enough to see through that male pontification.