Yes, it is helpful to tell stories about how the cycle of abuse really works, but not because they’ll refute or replace the romanticized fantasy, or destroy its appeal. They won’t. What they’ll do is similar to what an out-of-story reality check or an “abusive relationship” tag will do: they’ll say “hey, when this does happen it’s actually pretty awful.” And they’ll go beyond that to give people models for what shit looks like and possible ways to deal with it. They’ll do that even if some of their edges are filed off and some of their agony is distilled into drama, which is why it’s the opposite of helpful to lump everything you think is flawed/ambivalent/insufficiently realistic into the “romanticizing” category and try to exterminate it all. That actively suppresses resources that might actually reach people who are into the romanticized stuff and have picked up distorted ideas about abuse, whether from the fiction itself or from the culture they were raised in.