What a brilliant spokeswoman Susan Smith is! She is clear, sensible, full of the facts, compassionate. Of COURSE one of the first things she was asked was, 'but do you not feel you should be KIND to the poor trans women?' 
The idea that JKR 'bankrolled' this is absurd. It's well publicised that the most she funded was 100K (I saw 70K cited too). Do people honestly think a court case like that only cost that much?? No no, ordinary women (and probably a few guys) put in fivers and tenners and if they could afford it, £50 here and there. The TRAs can't cope with this idea and naturally would prefer it if the Wicked Witch of the North funded the whole shebang, as obviously she's capable of doing.
Obviously this is a really good reason for JKR not to have funded it all herself, because it just opens it up to criticism. And I'm sure she also wanted to give the rest of us a chance to be part of this, which is very important. The victory belongs to us all.