Genuinely curious

To put it simply: No, it doesn't add anything to the story.
What it adds is mostly shock, drama, forced proximity and I think some authors use it as a shortcut to “depth” without actually doing character work.
I think a lot of readers like it because it eroticizes extreme power imbalance, taboo, or “forced desire.” This directly affects why it's used: Its presence is often driven more by audience demand than by meaningful character or plot development.

Thanks, that genuinely helped me see the issue more clearly!

I personally think that adding that stuff works ONLY WHEN it's brought in to show the REALISTIC psychology of a traumatized person healing from their trauma, be it thanks to love or whatever (I'm actually a sucker for hurt/comfort of any kind), BUT it's pretty obvious that 95% of authors add it as a kink. In these cases it adds absolutely nothing, it can't be anything other than a kink. That or, as I saw a commenter say a few days ago, it's added by lazy authors who want to make the story "psychological/dark" without putting in the effort to make it actually interesting and original

There it is, you said it much better lmao

I used deepl to help me translate it.
My English is actually rather bad.