I even don't think that having a white male majority at this moment is some failure of a LW community

There are other options. I think there exist possible worlds where LW is less-offputting to people outside of the uppermiddleclasstechnophilewhitemaleosphere with demographics that are closer to, but probably not identical to, the broader population. Like you said, there's no reason for us to split the world into all-or-nothing sides: It's entirely possible (and I think likely) that statistical differences do exist between demographics and that we have a suboptimal community/broader-culture which skews those differences more than would otherwise be the case.

Edit: I had only skimmed your comment when writing this reply; On a reread, I think we mostly agree.