This is just one of those things where men are from mars and women are from venus. I can't imagine a guy just having someone beat the shit out of him, throwing plates at them, getting pummeled and being like "Derrrrr i think I will keep staying, it's not that bad"
I literally can't compute it in my head.
I mean, ok, power dynamics of relationships with women and men might make women more afraid of their partner, but that doesn't explain the cognitive dissonance of actually believing everything will be fine, or that the abuse was a "one time thing" or that it was actually your fault. I also think I would have a hard time believing if the numbers would be the same for gay couples. Maybe I am wrong though.
Secondly, fight or flight is pretty much evolutionarily coded into our brains. If it gets to the point where you are derping around and getting the shit beat out of you repeatedly and you still have to wait for the "right time" to leave "when you're ready", then you have something seriously fucked up in your head and you are no longer capable of making rational decisions. Letting someone that isn't able to fully tap into their survival instincts try to come to a rational decision on "eventually" leaving their abuser seems like a recipe for disaster.