No, he’s not one to pretend, he’s saying that what he or anyone else thinks about trans people just not relevant to him in virtually everything he does, supporting or rallying against a trans politicians’ position on other issues like technology. To give a separate example, does Alice Weidel’s sexual orientation have any relevance to your opinion of the German right-wing fascist party leader? No, it’s similarly irrelevant, and I can make assumptions, but you don’t have to tell me you support or oppose gay marriage to know that.