The kyriarchy* has many tentacles. And phenomenal regenerative capacity. It's going to take all our collective efforts, from every possible angle, to make progress against this kraken.

Which is to say: agreed. Making one cause your own isn't necessarily a bad thing, but undermining or denigrating all the other causes that should be your allies is a terrible idea and won't help promote any kind of justice.

(*On a philosophical note, I'm not sure that I agree that there is no fundamental underlying oppression, but I do agree that none of the specific tentacles we see and fight are It. What they all have in common is the idea that people can and should be sorted into the ones on top and the ones beneath, the ones who matter and the ones who don't - the rule of lords, in a sense, which is why I find the kyriarchy a useful concept. In practical terms, though, we can't really tackle the underlying concept; it's underlying! We have to work on all the manifestations, or as many of them as we can track. And try to build alternate ways of thinking along the way, since we're all steeped in this mess from birth and breathe it like air.)