In the YouTube clip, the speaker says, ‘Objects don’t exist in the world waiting to be described, instead they are produced by how people talk about and use them’. This reflects a social constructionist world view, or ontology, that can make sense when applied to socially constructed phenomenon that have no material basis - such as laws or social norms. It is batshit crazy to suggest this ontological position applies to sex, a material phenomenon.
One can take a critical realist position, whereby you recognise that sex is material and exists independently of human thought, but society and individuals create meaning about what it means and involves. This is what moderate GCs put forward, stating that social norms relating to sex are damaging and/or limiting. This is what TRAs used to claim, but stating gender was far more important than sex.
This is what they did up until pesky feminist started pointing to laws that define sex in material terms and don’t refer to gender identity. If Dr Upton’s testimony in the Peggie v Fife tribunal, could have been ‘yes, I’m biologically male , but societally female, he could have made a more coherent case (I would still disagree though). Instead, because of the law as it was being put forward by Peggie’s team refers to sex existing outside of human thought and language, he was forced to give his batshit testimony.
I think some academics and scientists enjoy sojourns into social research. I expect they find it stimulating and interesting to explore viewing the world through a different lens. If this was being done in relation to cancer, or genetic modification, I wonder if they would enjoy it as much?