Sometimes it sucks and is unfair. Sometimes awful, unthinkable things happen. We can not expect the world to think of every terrible possibility and walk on eggshells to avoid triggering our nightmares.
I think what I'm saying is all of these things are connected. For me, at age 37, this is maternal health. If I don't talk about these things, reflect on them, consider them as parts of me as a whole person, and as a whole parent, who will?
Is it a good idea to warn students that a given work might be upsetting? Absolutely. That's just good pedagogical practice. The real question is whether institutions should be mandating formal trigger warnings on syllabi and before showing potentially objectionable films.
For certain, coming to terms with sexual abuse is difficult terrain, but it is one that is worth traversing. Knowing about terrible things, and grappling with them, gives us the ability to mobilize, to change our world. Only then do we have the opportunity to transcend our pain.