I believe capitalism is basically promoting narcissism at every level of society (especially among the rich). I can see this personally, western millenials are some of the most narcissistic people I have ever seen alongside ancaps, they can’t take L’s even though it’s absolutely warranted. It’s especially bad with parenting, when you rightfully tear someone to shreds for parenting mistakes they go fucking full Tumblr warrior and go ballistic on the critics even when most of them are shitting on them with good faith in mind.
Another example of this me, me, me, shit is entrep bullshit. It’s pretty clear entrepreneurship is just narcissism disguised as a way out of poverty.
Clinical narcissism is rare, and if you know of anyone who has it, you won’t ask the questions you asked because it’s simply a different issue.
So maybe you think that narcissism is equivalent to bring selfish, using a more casual definition of the term. If so, I think again you’re mistaken. There is some overlap, but they certainly aren’t equivalent.