The whole I'M TRIGGERED thing is all about controlling social interactions.
The people who would actually do this shit don't really feel like they're in control of their own lives and destinies. They've never had to learn how to deal with competition and conflict, or manage their own emotional discomfort. So now that they're adults the best they can do (at least among their SJW social circles, because nobody else cares) is shut down any interaction that feels uncomfortable by claiming they're "triggered." And, by pre-emptively pointing out things that "trigger" them, they can control how their SJW friends behave around them.
I don't doubt most of these people suffer from anxiety; when you're emotionally unequipped to deal with the challenges of living, and don't know how to productively push for what you want (and thus need it given to you), that's pretty much a given.
But outside of college campuses and Tumblr, do people actually do this shit IRL? I've yet to encounter it. Granted, my social circle is really, really short on dangerhairs indoctrinated in SJW-speak, and they actually have jobs they're doing well at, and thus some sense of personal efficacy, so crawling behind the rock of I'M TRIGGERED just hasn't happened. So I suspect the ones who do use it to keep their internet/campus friends in line, and maybe try using it on their parents to see if it will get them what they want, are the ones who just get silent and stare at their shoes during normal social interactions that take an uncomfortable turn.
I call it "Piece of Shit at the Center of the Universe Syndrome." There's such a weird push-pull between those feelings of shame and self-loathing, and the childish narcissism of believing all eyes are upon oneself.
I know some very wealthy people who do not live the kind of lifestyles you would expect them to, and who live in much more modest homes and in less exclusive neighborhoods than they potentially could. I also know a few people who you would never, ever guess were multimillionaires, based upon where they live and their patterns of consumption.
There's no Rich Person Rulebook that says you have to live in the most exclusive neighborhood and own the most palatial home you can afford. When you're rich? You can live wherever the fuck you want. And, frankly, living in the most exclusive neighborhood, in that palatial home, can have some drawbacks. People respond to you differently, and not always in positive ways. The people who have that kind of wealth and choose to live that kind of lifestyle can be pretty fucking weird and out of touch, especially when there are generations of inherited wealth behind them. And the nouveau riche? Well, yeah, they're just horrible, no matter where you go.