I don't think it matters whose 'side' she is on, provided the matter is handled with impartiality and professionalism.
The interview was decidedly chilly and lacking in enthusiasm but, despite the contrast with WH's general output, I don't think we have the right to demand warmth and enthusiasm. This is overly reminiscent of the 'nothing but complete capitulation is acceptable' stance we've received for far too many years from the TRA movement.
A degree of bias was present that did irritate me, which was that the issue too-often came back to 'how will transwomen be feeling about this?' This is not women's responsibility. Our objective was to protect our own rights, not to persecute others or take rights not belonging to us. This all along has been the fundamental difference between the GC and GI positions.
Susan Smith handled those questions like a champ. She placed the onus of responsibility firmly back where it belongs: with men, suggesting in the most measured, calm and civil way possible that the rest of the world's problems are not women's to fix. And at the very least she wasn't shouted down in the usual aggressive style of today's interviewer.
Overall, the interviewer had the effect on me of the most tempting chocolate cake staring at me from the bakery window, only to eat it and find it completely unsatisfying and tasteless. The interviewee had the reverse effect.
I agree @IsabelleSE19 that the falsification of legal documents like birth certificates is alarming, and shows us just how close women have come to the wholesale loss of nearly every right our foremothers won for us in the 20th century.
Unfortunately I don't think we have heard the end of this.