I get what you're saying, and I do try to view things from 'the other side's perspective because I know I am biased towards the GC view. But I think there are important differences between the two scenarios.
Trans activists often make false claims that go unchallenged on mainstream media, e.g. about suicide risk or what the law actually is. HH did it in the interview by mentioning Trump and when Martine (calmly) asked him to explain what he meant he couldn't and tied himself in knots because Trump had nothing to do with the SC judgement. So what is it that TRAs would find hostile about the interview? The fact that she pushed back on the claims instead of unquestioningly accepting them whilst nodding sympathetically?
Whereas, at the WEC session, Sarah Owen was undoubtedly rude in her tone. She cut baroness Faulkner off when she was talking about her ill treatment at the hands of activists. And whilst Baroness Faulkner clearly knows her stuff, Sarah Owen hasn't even bothered to read the judgement, so not only was she rude, she was ill-informed as well. It was unprofessional conduct for a chair.