It looks like there is a word or two missing in what you were trying to say. But to clarify my point I'd say that if scientific studies show something that goes against what Baha'u'llah has said, then wouldn't Baha'is all agree that Baha'u'llah is correct and those scientists are wrong? So if scientific studies say things about gays and transgender that disagrees with Baha'u'llah, then I would suppose you'd say they were wrong and that the Baha'i Faith is not being superstitious. They, instead, are following "God's" word. A word that was given by a person coming from an Islamic background more than 150 years ago that claimed God told him so?
I see Baha'u'llah did not write any 'science' on what it is to be "Gay", or science on whatever any person wishes to place on gender identities that have come to the mind of the world. I see Abdul'baha and Shoghi Effendi spoke upon the subject applicable to the mind that was in the world at that time.
Baha'u'llah gave a law that any lawful marriage is between a man and a women and sex outside that union is not permitted. That Law cannot be changed.
Thus the challenge is given to us to implement, if one is not a Baha'i, then they are free to not even consider that challenge.
Regards Tony