Sadly, the reality is you can’t go back and stop the original development of PB, cross sex hormones, surrogacy, womb transplants etc. How these medical development are then applied/used can be shocking and certainly not what was intended.
What you can do is put the right safeguards in place. I would far rather a multi-disciplinary team considered the whole person (child and adult) and ensured they were making a fully informed decision. Where appropriate, with a judge making the final decision.
The opposite is to force it underground and people get PB/cross sex hormones on the internet. With little to no medical supervision and a huge potential for getting it wrong.
One of the biggest failings in all of this is the lack of high quality data. Had proper longitudinal studies been done on PB/cross sex hormones Baroness Cass’ job would have been made much easier. Her report would have been even more compelling. Thankfully this data should now be being collected but it will take time.
You only have to look at the newish “miracle” weight loss injections. Developed for good reasons to help morbidly obese patients to reverse diabetes, liver issues etc. losing weight was just one of the benefits.
We now have adults (and I suspect children) who don’t need them finding ways to get round the rules to get prescriptions online. There are side effects some of which may be permanent. How do you control this?
I am pragmatic and whilst I would much rather children and vulnerable adults didn’t have the option of PB, cross sex hormones and potentially as adults surgery the reality is they do. My view it is how you manage access that is important.
Surrogacy is another one, an option in theory for altruistic purposes e.g. a family member carrying a child for a female relative born without a uterus. We can’t go back but OMG we need to get the legislation right.