Its untrue that US police are not obligated to intercede for your protection or safety?

Its untrue that US Police did not let over a dozen children get slaughtered while hanging out in the hallway, PLAYING ON THEIR PHONES?

Its untrue that a pizza delivery person who is suddenly violently accosted or involved in a traffic accident is helpless to remove themselves from the situation?

Please, tell me.

Edit: oops, I just realized I misread. Still gonna leave this here tho