I wish I could find it on YouTube now but years ago I watched a video of a man and woman in public taking turns being abusive to each other to see how many people intervened. The difference was night and day. Their colleagues even stopped people that passed by and talked to them. One of the guys they stopped who walked by the woman being abusive to the man was an off duty cop and even said he would have stopped if it had been the man acting the same way to the woman.
People seem to have a tendency to infer motives to why people do or don’t do things. Are people giving someone a pass based on gender, either way, or are they giving a pass they would give to someone of either gender. Is it because they don’t believe the other person for reasons that have nothing to do with the relative genders?
It’s like all the culture war stuff. If you think everyone is looking at world a certain way you’ll find plenty of examples that are false positives.