Would I prefer a world where all humans could be happy without undergoing these medical interventions? Yes. Clearly, we don't live in that world. It's clear there are happy trans ppl who are glad they medically transitioned. This isn't about banning.
First, the medical system in the UK is nothing like in the US (in any way). Second, I'd recommend interacting with some of the (mainly) detrans women on here, ask them about their experiences at clinics. BTW haven't see any of them trying to ban transition for anyone.