I ultimately come down to this: cissexism and perisexism are very overlapping oppressions, to the point where there's very little unique to one or the other, and we should be building coalitions with each other, but "coopting intersex struggles and then not even bothering to speak out against intersex-specific issues" is not how you do that.

Like if they called it transmisogyny/transmisandry but then also linked to ISNA/OII and campaigned against the medical abuse of intersex people I'd shrug it off. BUT THEY DON'T.