Sometimes silence is all you have to register protest.
They will have been briefed on appropriate answers. They know they cannot say anything critical. I've seen sportswomen asked about transgender competitors come out with non-committal platitudes, where you realise afterwards they skirted the question and avoided all possible trouble.
That silence was defiant. It had teeth in it. I remember it from my childhood under a totalitarian regime and I will remember these brave women for not playing along.