Well, yes, that scenario seems pretty implausible. Still, some of the discussions we've had on these forums do give rise to certain transphobic sentiments -- but from a perspective that is very different from yours.
A minority of the TS people here have an undercurrent that I fear, to a certain degree. Not in the sense that the Religious Wrong fear transsexuality, but rather in the sense that transsexuals fear those nuts. I do not believe this has anything to do with either clinical or large-scale social aspects of transsexuality in itself; rather, the kind of factionalism (of the type 'I can't believe that a so-called androgyne identity exists') is an unfortunate by-product of the transgendered community having very wide internal variation. I am quite committed to a general acceptance of transsexuals; it's just that I'm afraid some of the TS people would be willing to sacrifice the acceptance of non-binary gender identities in order to achieve this. That's the phobia here.
Distasteful as this film may be (and I doubt there's very much chance of any of us ever seeing it), it might prompt some useful discussion.
Nfr