I'd say that's mostly because the problem here is that we're focusing on the wrong demographic information. We shouldn't care what race or gender or sexual orientation someone is, we should only care whether or not they need our help. We don't need a social stratification narrative in order to bring help to people who are in need. That does more to fuel outrage culture than it does to actually help anyone.
Who exactly are you talking about anyway? Who thinks of things in terms of social stratification? Because intersectional feminists are a pretty tiny portion of the population and aren't really even remotely what I'd call mainstream.We need to persuade them. Right now, they think of things in terms of social stratification, and so we have to play in that ballpark, because they refuse to play in ours.
Why? This is a terrible strategy in my eyes. Letting your opponents dominate the conversation without ever challenging your narrative doesn't get you anywhere.