Because, you see, after excluding all studies not carried out in the UK, restricting to studies on trans kids, and then individually discarding the studies that remain, there's no evidence of safety. In fact, there's no evidence at all! Further research is needed before we feed experimental drugs to our vulnerable children. (We have to pass an emergency prohibition about this, because those meddling "doctors" won't listen. https://www.legislation.gov.uk/uksi/2024/727/made)

Cis kids are… biologically different, somehow? So the studies demonstrating safety and efficacy apply just fine to them. Yeah, that's totally the reason: medical necessity. Not politically-motivated discrimination against a protected minority, no siree.