At this GIA conference, the microphone isn’t just a tool for being heard, it’s a social justice issue.
The rules of engagement, sent out in advance, names the use of a microphone as a way of helping folks with disabilities participate in the event. It’s right up there with recognizing other points of view, not over talking, and giving props to the native people whose lands the meeting is taking place upon. To not use the microphone, then, is to exclude, to discriminate, to be rude.