I'm willing to call systems that perpetuate existing biases "inequitable" ("inequity") because the idea of equity inherently involves existing social context.
Of course one might ask, "Well, why can't the concepts of bias and discrimination involve social context?" Well, they sure can; in fact, most uses of terms like "systemic [bias/X-ism]" seem to.
There's no point in arguing over definitions and I guess it's "just semantics" to a degree. But again, I think the distinction matters.
In most cases I can bite my tongue because many of the specific proposals/campaigns are reasonable efforts at addressing inequity, but this sort of "rhetorical confusion" makes it difficult for me personally to fully participate in a lot of social-justice movements today.