Just playing devils advocate for a moment so bare with me. I think in your case, it may stay because of the fact that 0.1% - 0.2% of all births result in ambiguous sexual organs, so much so a specialist has to be called in to determine the dominant sex. So, in this case Trans is not a mental illness and persons born this way can have hormonal issues that explain a feeling of confusion when it comes to preference. And while 99% of those who call themselves trans now are in no way actually suffering from what ive described above but for legal purposes, a company must draw a line to avoid potential lawsuits.