Say a man somehow manages to get out of a toxic relationship with a woman. This may be a sexless beta-orbiter type situation where he was subjected to emotional manipulation, or it may be something more serious like an acrimonious divorce. The man is aware that this particular woman is toxic, and should be avoided. Without any exterior guidance or warning, however, he is bound to get into a similar situation again. Why is this?
The oft-cited example is of men who are brutalized in divorce court, only to line right up for marriage again. Some of these men have multiple strings of child support and alimony obligations. Other less extreme examples include the eternally-clueless beta, who keeps getting "lets-just-be-friend"-ed over and over again, without learning. Heartiste recently had an admittedly good post on this very topic, attempting to distill why it occurs.
Of course, what Heartiste doesn't mention is how many "alphas" are caught up in the same type of thinking. I know of very few "alphas" who do not get into emotionally abusive relationships with women. The core problem seems to be a societal hegemony of the "don't generalize" dogma. How many times have you been shut down by the armies of "don't generalize" people, also known as the NAWALT people, both male and female, every time you mention harmful female tendencies?
It's a problem of frame. Of course one shouldn't assume that all women are abusive because one woman is abusive. But somehow this gets twisted into seeing every new woman as a blank slate, and not remembering the warning signs from previous experiences. I think society encourages this unhealthy attitude, which is why you see men falling into the same traps over and over again. The whole "this time it's different" belief is a natural tendency in humans that needs to be fought, not encouraged.