How does your post contradict what they said? You asked how it impacts a binary trans person, and they explained that the part about it being unchangeable is supposed to target y'all (and all trans people).

I know a lot of us, probably most of us, haven't changed so much as taken ownership of who we always were. So yeah I guess technically this order isn't a "gotcha", but unfortunately that's not how transphobes see it. :(