So first off ... it’s not a big surprise that trans activists are identifying as having won the case.
Second, the headlines saying “under 16s can get puberty blockers if they understand treatment” are being a bit obtuse. Yes, technically this is true. Under 16s, as per Gillick can consent to medical treatment if they truly understand and consent.
However, the crucial part of this judgment is the court saying there is a legal presumption that for this kind of experimental treatment there is a presumption that under 16s cannot consent and it is dubious that under 18s can consent, so they will have to get a legal court order in order to get treatment (much like 16 year old Jehovah’s witnesses need to get a court order to refuse a blood transfusion).
What the court is saying is “they need to understand to have consent... and due to the nature of this treatment we don’t think they do understand so there’s no consent here.” Honestly , mermaids is right to panic. This is a devastating blow to the rhetoric that blockers are harmless, safe and reversible and fine to give to very young kids.