It seems to me that the proliferation of staff networks has been a huge problem in this.
I imagine they started out as groups of people with something in common fighting for their interests. Fair enough, we can think of trade unions (in their early days at least) and many of us here in our own groups like WRN, Resisters, LWS etc. as being very similar.
But somehow they gained power out of all proportion, becoming the apparent 'go to' experts in their area. And they are expert in totally ignoring, dismissing and misrepresenting any other views.