I didn't know they had blind review for the papers; if they did not have blind review and for one reason or another knowingly chose an all-white-male speaker li

I didn't know they had blind review for the papers; if they did not have blind review and for one reason or another knowingly chose an all-white-male speaker list (or whatever they mean by lack of diversity in this case) I'd understand this move - they felt they made bad choices and want to fix it before proceeding. But if all the speakers were chosen blind, if done correctly taking unconscious bias out of the equation, it seems kind of silly to cancel the conference when their objectively best papers happened to not fit into their preferred demographic spread. Personally even if I was someone who would at some point be interested in speaking at such a conference, I would now avoid applying for fear of being accepted wholly or in part to fit their female quota as opposed to on the merit of my proposed material.