I am in agreement with you. The DSM defines things very well. But my point is that the “experts” can come to different opinions on whether someone meets those definitions or not. I’ve not had direct experience with narcissism diagnosis, but I have had it with ADD. My wife is adamant that our kids have ADD. Two experts said no, the second saying there was a “touch” in the middle child. But my wife kept fishing around and found an “expert” who would tell her what she wanted to hear, so the kids are on meds.
So I don’t take anything from an “expert” as gospel, be that from a counselor or MD.