That assumption comes from experience, by which I mean in my experience almost every single time I have seen the word 'privilege' used it is used as a weapon to

That assumption comes from experience, by which I mean in my experience almost every single time I have seen the word 'privilege' used it is used as a weapon to turn a discussion from a thoughtful, respectful one to hateful screaming about the personal lives of others, and to tell people that their opinion is irrelevant because their life experiences don't match the currently approved life experiences (some collection of socioeconomic disadvantage, minority ethnic background, female, LGBT). I don't really happen to meet the textbook definition of 'privilege', though I think that's pretty irrelevant here. Do you really think it's important whether this particular poster is 'privileged'? If it came out that she were actually a poor trans orphan who grew up starving and had a severe physical disability, would it change the discussion? What if he were a 22 year old tech bro with a rich dad who chugs beer and red bull and harasses women in his spare time? Are the points he made less correct now? If you think so, you should reconsider how you evaluate arguments, discussions, perhaps words themselves. Does it matter for any real purpose of the discussion other than to help you condescendingly armchair-psychoanalyze him (as you have with me) and tell him that his background is why he believes what he believes, and that he just doesn't really understand and never can? The beauty of discussions online (and there are plenty of drawbacks as well of course) is that you can express yourself, state an opinion, have a thoughtful discussion with others without people hating or dismissing you for who you are; only what you say. That's why most forums don't have a "real names policy". That's why most forums don't have a 'privilege-meter' next to usernames that uses a sophisticated algorithm to measure how many disadvantages a person has been through, spitting out a final number that tells us how seriously to take her posts. This kind of unsolicited digging into a person's personal life is generally frowned upon in any online discussion forum.