system
A chat on subreddit /r/NoStupidQuestions
human
I'm not trying to make a point here, just trying to learn, but why does the distinction matter? The way you phrase it makes it seem like it makes them different, but isn't it the outcome that is important, which is the same? 

I get that the implication of it is important, because one means dealing with an individual, and one means dealing with the whole system, but I feel that doesn't make a mansplaining male any worse than a "big headed woman," which is what I understood as part of what you are trying to say (maybe I read it wrong though).
gpt
You literally just said it yourself? The mansplaining is a byproduct of a system that favours men, which leads to women being shunned, dismissed and generally not having the same opportunities as men. In my experience sexism is much more insidious than big headedness. Someone who is big headed does not necessarily view someone they are talking to as weak and more widely inferior. A lot of men, especially those who mansplain, specifically view women as inherently less intelligent and generally more inferior, which contributes to some very problematic societal ideas about women.