The complaint is not about having lots of voices. The complaint is that the damaging ideology is already damaging the rights and protections of women and girls, which did not fall from the sky, nor were gifted by unexpected benevolence, and it's not ok to be putting the voices of the people being used as a wedge to demolish those rights as the centrepiece of every argument on the topic.
That's the issue here. Glinner is a nice man, and speaking up was the right thing to do. But putting anyone who is not female's voice front and centre is not on. Glinner gets most of this, but his need to show that he's pro trans is the Achilles heel here. The women who have been at this for some time have long ago realized that you don't need to quantify every fair defense of your own rights by adding "I'm pro trans" disclaimers constantly.
We don't need to show that the rights we have already fought for are justified by being mindful of how everyone else is getting along. This is related to 'No is a complete sentence'
'Women must have their rights protected.'
It isn't necessary to add 'people other than women agree this is a good thing.'