Sometimes people talk about triggers as though as though being triggered means having an extreme reaction to something that it’s perfectly normal for most people to find upsetting.
Some triggers are like that. A lot of them are not.
Triggers can be things that make no apparent sense at all from the outside. They can be anything. For instance, someone might find teddy bears triggering. Or being spoken to in a reassuring tone of voice. Or a certain song. Or wearing a t-shirt.
They are not necessarily about concepts.
Having trauma-related triggers does not necessarily mean that someone will have an unusual amount of difficulty discussing upsetting topics.
Discussing the concept of abuse or the particular kind of trauma they experienced *might* be triggering, but it might not be.
For instance, someone might be triggered by the smell of popcorn, but comfortable discussing abuse and abuse prevention policy. Or any number of other combinations.
Knowing that someone has experienced trauma doesn’t mean that you know anything else about them. Not everyone who has experienced trauma gets triggered. People who do get triggered, get triggered by a range of different things. You generally are not going to be in a position to know this kind of thing about someone else unless they tell you.
tl;dr Trauma-related triggers can be just about anything. They’re not necessarily conceptually related to difficult or politically charged topics. Some people who have triggers aren’t triggered by discussing the relevant concepts, but are triggered by otherwise-innocuous things they associate with their experiences. Trauma can be complicated and doesn’t always fit with the prevailing cultural narrative.