This is a terrible example of "the left eating its race."
They have a point. Trans girls never cast as leading cis women, why wouldnt they bring up that a cis woman is playing a trans woman? Hollywood cant have it both ways.
I'd say it's a bad example of the left eating itself, but it IS an example of the left working against their own self-interest. ScarJo has a ton of star power and her inclusion would have brought significant attention to a movie that wouldn't likely have gotten much otherwise. The result would be a bigger turnout and more people having this issue brought to their attention. Choosing to demand a trans woman for a trans role over AAA star power for a social issue that they would also argue needs far more focus is shooting yourself in the foot a bit.
I wouldnt have an issue with them casting a cis woman for a trans role, but they never cast a trans woman for a cis role. Either go both ways or neither. Maybe the trans woman they have play the role this could be her big break.
I can understand why trans actors and actresses would be upset by that double standard.
This is a trans man though. They should cast a man, cis or trans. Not a woman and especially not a trans woman as that would conflate the issue on several levels more than merely casting a cis woman.