Chances are that a lot of the folks around here are both makers and managers. The contextual change between maker mode and manager mode however is enormously expensive. It's not dissimilar to a CPU context switch. However, meetings have the same effect on a maker that busy waiting has on a CPU. You just can't get anything done while you're waiting for the meeting to be over, something that is exacerbated by the knowledge that most meetings are unnecessary and a waste of time because they're poorly run.