(Eta: sorry notbadconsidering I’m replying to the post you replied to not yours)
That’s because left-wing people who are GC, and people in many traditionally lefty fields like the arts, social work and academia, mainly have to keep quiet about it to keep their jobs and often their friends and families, especially their indoctrinated children.
Meanwhile the obvious empty-brained ludicrousness of gender ideology that has become affiliated with the “left” (bizarrely, as it’s a very classist, capitalist, hugely misogynistic and often racist movement) is an open goal for the right so of course they are going to attack and oppose it. However, if you think GC in itself is right wing you don’t understand what GC means. It is not the same as thinking women should stay in a gendered box because of their sex - it’s the oppposite. It’s thinking that as you can’t change sex, women are stuck with the disadvantages of their sex (as are men, though their sex-based disadvantages are fewer) and therefore women need sex-based protections and provisions - while also being free to do and be whatever they like in terms of gender expression, career, relationships, clothing etc.
Conservative sexists think women should be confined within “feminine” gender norms. GC feminists don’t. But it’s not really surprising that this is all a bit too complicated and nuanced for people who think sex doesn’t exist, biology isn’t real and simultaneously that you can change sex (that doesn’t exist) and are being shafted by big pharma.
Then you do have people like Glinner and KJK (and sadly others) who embrace the right, sometimes the far right, from what seemed to be a GC perspective. That could be because they have been so comprehensively kicked to shit by the left, I guess, or because as we see with Glinner, they maybe weren’t actually genuinely left anyway - or at least not genuinely feminist. (KJK often points out she never claimed to be a feminist.) I don’t like this at all and don’t understand it. For me being GC is a natural part of being a lifelong left-wing feminist, along with being a rationalist who understands evidence.