The need for queer solidarity really hit hard after the Government first announced it would not be banning conversion therapy at all. Then u-turned on that after backlash and subsequently announced it would ban it, but only for gay people. Meaning they would still allow people to attempt to torture the gender identity out of trans people.
Specifically, it was viewed as such because it did not require any medical intervention. It respected bodily autonomy! You could and can still obtain a new birth certificate without ever desiring hormones and surgery. Sure, you are still subject to the intrusive Gender Recognition Panel's whims, about to be set back a bunch of cash you probably couldn't afford, gatekept by a crap healthcare system to hell and have no non-binary options at all. But theoretically, its totally possible to be a woman with a penis, by law.