I think this is the concern that Rico was referring to:
Why are trans people now excluded?
Nikki da Costa, a former director of legislative affairs at No 10, told the BBC on Friday that a ban would have had “profound consequences for children struggling with gender dysphoria. It would create a situation where doctors, therapists, even parents would be deterred from exploring with a child any feelings of what else may be going on for fear of being told they’re trying to change a child’s identity. And that is deeply concerning.”
My question is why not ban trans conversion therapy and make an exception for medical situations where gender dysphoria is being diagnosed? As things stand, you've now got the problem that more extreme versions of conversion therapy will be legal. This is from the BMA
“In fact, ‘conversion therapy’ has been debunked countless times as an unethical and damaging practice that preys on victims of homophobia, transphobia, discrimination, and bullying. For those subjected to it, it can also increase the risk of long-lasting psychological harm, substance abuse, or even suicide. Many acts of conversion therapy amount to torture, inhuman or degrading treatment or punishment - a violation of international and UK law. That the Government can recognise a set of practices, methods and activities as ‘abhorrent’, damaging and cruel for one group but suggest that those same practices, methods and activities can be acceptably perpetrated on another group is profoundly troubling.