Agree, Mangy. I find the progressive cleaving to change as unfailingly a positive thing as quite irrational. It is presumably the mirage of a future Utopian ideal coupled with a vague idea that thrashing around and 'changing' things for the sake of it will undoubtedly work out.
Your last point makes good sense, too. It's not really about making things better for everyone, it's clinging to an abstract ideology for the feelz, rather than actually facing up to the rather prosaic work of balancing competing rights.
You'd think the fact that society is full of competing rights is really quite basic logic. But it is perhaps easier, intellectually, to pretend that there is a very simple 'right side of history' and if one focusses on this imagined perfect ending, then today's collateral damage just doesn't really matter.