Are you an asshole, @SilentHamster102 ? Maybe, I don't know you. At least you are honest.
Folks, I would not get involved in most of the scenarios given here as examples. I am a licensed security guard, and yeah, I would stand down.
It's like this. Firstly, actual conflicts of one-sided distress are as rare as winning lottery tickets. Much more frequently, one or both sides is presenting a biased story of the event which was more of a fight than an unprovoked assault. Evidence: when I ask a self-described victim to look at the video with me, the victim always changes a tune and makes an excuse to drop and leave. If some harassment happens which has every indication of being one-sided victimization, I will still take a few seconds of pause to determine that.
Secondly, the law os EXTREMELY limiting in what I am allowed to do. Even in cases of breaking and entering into a business that I am guarding, all my state government allows me to is call the police and ask the burglar to remain in place until the police arrive. If someone attacks me with violence, I am permitted with respond with only the amount of violence which is proportional and appropriate. Even doing that is likely to result with me in court as thr defendant.
Third, if I do insert myself into a violent situation, I am probably not improving that situation. More likely, I am escalating the violence and making everything worse. Yeah, I want to be the action hero who takes down thenbad guy, but I inderstand that it's better to be the unsung hero who serves for years and never had need to draw blood once.