I really more and more am thinking this is a confluence of
1...the so called last frontier on discrimination, PoC and gay prejudice in the past, trans became the group in our current time that demanded championing from the start.
No artist would not choose to be on The Right Side. Which makes JKR and Glinner such outliers. And that also stretches to scientists and other objective professions.
2...our current subjective age where all norms are shunned and any criticism of lifestyles viewed as prejudicial moralising.
No artist has ever not defended alternative lifestyles and presentations. And in a post Christian world, definitive statements of right and wrong are even more scarce than ever. Again, scientists won't have anything to say here.
3...social justice infecting and then controlling the narrative on science. Where research grants are predicated on projects formally expressing critical race theory and anti transphobic sentiments.
Control science via politics, produce a new generation of objectivists who are now subjectivists. Cue zero kick back from Goldacre, Brian Cox, David Attenborough, Von Tulleken twins, and tbh, the broad swathe of scientific community.
4...the days of mass media being a truth seeking profession, now more like herd following and consensus forming.
I think the world of cultural and scientific elites are herding or flocking around these outlooks, and it takes potential career destroying risks to break away. And humans are risk averse and cowardly in so many cases.