Keir Starmer's answer was measured and compassionate to all parties
It's easy to appear to be measured and compassionate if you spout contradictory platitudes.
The problem is that you can't in reality deliver a solution that is simultaneously supporting male people's right to (be treated as if they have) become women and female people's right to treat them as if they have not.
It"s like agreeing to draw a aquare circle, or have a moonlight sunbathe. A person can say it til the cows come home and castigate people who challenge them to explsin how by caling them toxic and inflexible as if it's their problem a person is selling snake oil, but that doesn't change the fact that the person can never ever ever actually deliver it.
So suggesting they can, however pretty their words are, is not really measured or compassionate at all. It is patronising, manipulative and duplicitous. It's no different to Johnson's cakeism, and we all know how well that turned out.
Jane was 100% correct to burst the illusion Starmer was trying to get away with. In fact him treating her, and by extension all of us, like a fool is far ruder than her interrupting him to point that out.