Not all literature should be triggering, no. I suppose all literature could be triggering though, could it not? I support labeling materials that seem likely to be offensive to some. At the same time, I don't like the idea of babying people. It's a tricky situation, I find it hard to make a clear decision one way or the other.
I don't think it's really babying to include a tiny note about how the material contains issues related to various broad topics. It's like suggesting that it's "babying" to include a note before a TV show that it contains flashing lights and might set of an epileptic seizure.
I would say a note before a video of such nature would be reasonable, which I'm totally ok with. Anything beyond reasonable (I know, subjective) I would say is babying.