Well based on this, I doubt you've known someone who has been abused in childhood or have gone through it yourself. Only someone who has been through this or knows someone who has knows what living hell an abusive narcissistic parent turns their child's life into. Narcissism communities on various sites are fairly big for a reason; if this issue was easily fixable, communities like this wouldn't be so big, and common terminology (no contact, grey rock method, hoovering, etc.) wouldn't be as widespread if it wasn't a serious problem.
I'm not talking about troons who THINK they have an abusive parent because they won't put up with their gender reassignment nonsense - I am talking about serious ramifications someone deals with throughout their life because of being raised by someone with a Cluster B personality disorder. ACTUAL abuse, sadly, is common, and not everyone in these communities is someone whining because of ONE spat they had with their parents when they were a preteen. In my time reading up on these communities, I have read and heard about physical abuse, sexual abuse, stalking, names being forged on bank and legal paperwork, and various other kinds of maltreatment. If I think hard enough, I can probably think of one or two times when someone on RBN or a similar community may have been overplaying a story, but I have never seen someone in them say something like "My mommy didn't buy me the right color Honda" or "I didn't get a cookie".