Climate Change...or Gender development.
Virtually every aspect of human development has demonstrable variations...from physical features, to intelligence, to hormonal and genetic differences...but according to the Luddites, NO differences in hormonal or genetic development when it comes to anything related to sex. That makes zero sense, especially when there are scientific studies indicating such possibilities (see link). Not surprisingly, such ancient and immovable perceptions come from Backward Thinking religious sects.
Just as "Conversion Therapy" has failed miserably for Gays and Lesbians (never mind their very positive contributions to society), the denial of Transgender reality is only going to make things worse for innocent human beings having to deal with something they can't change. Sadly, this attitude is endemic of a group (MAGAs) who's first thoughts are to ostracize others not like themselves...instead of empathizing, helping and welcoming them. They are actually the "Sick" ones.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC7415463/#:~:text=One%20of%20these%20studies%20found,very%20low%20influence%20of%20genes.