I do not detect a question here, but I *will* comment.
I can see both sides of this argument. On one hand, films about trans people OUGHT to have trans people in them. On the other hand, we as a group tend to be FAR too sensitive and become outraged at any slight, real or imagined.
Perhaps a compromise would have been better (and more accurate). Put a cis actor in to portray the pre-transition part and a trans actor to portray the post transition part.
ETA: the actor who did play the part did in fact consult with many trans people and was welcomed warmly.
Linky