"Right wing politicians" are irrelevant here. I'd remind you that the previous Conservative govts tried three times to get Self ID onto the statute books & like New Labour before them, ignored whistleblowers at the Tavi for over a decade until Keira Bell & her co-claimant secured a judicial review of the Tavi's antics & the judgment went in their favour. It was only then that Cass was commissioned to conduct an independent review & with the state of Conservative polling at the time, it was a safe bet that a 4-year lead time would leave someone else holding the hot potato when she'd done.
On the Right, people like Badenoch & Cates were atypical in their publicly GC views, & Farage's myrmidions still haven't managed even to identify the issues & were forced into immediate reverse ferrets as soon as they tried to trot out a line.
Opposing human trials of GnRHas to arrest chronologically normal puberty is not a left/ right issue, it's a question of medical & research ethics
Let's call puberty a "treatment" here for comparative purposes. We already have a treatment that is effective in ~85% of cases. We have no way at all of identifying the ~15% who are treatment-resistant, nor do we know if their longterm prognosis is good if treated with GnRHas.
The existing evidence in favour of GnRHas from human subjects is poor & weak, & the shamefully limited animal rsch already gives cause for concern.
Nonetheless, the proposal is to needlessly treat 85% of participants in order that we can collect inadequate data on the other 15% (leaving aside all other questions re the study design, it's simply too short a time frame). That's a wholesale failure of ethics.
What we should be doing now is, as you suggest, a proper retrospective analysis of the patients who went through the Tavi, as well as extensive trials in sheep. We should not recruiting more children to be subjected to GnRHas all because some adult men were sad that they didn't look enough like women - that's the original reason for the Dutch study, it was never about "lfesaving", only aesthetics.
Edited for typos