Because the person conducting the meeting has already failed miserably at their job and must be made aware.
A boss that conducts a useless meeting, knowing it's to hear themselves talk while knowing their subordinates are busy with important tasks that actually keep the company afloat is generally considered, and this is the technical term, a dick maneuver. His/her choice to have a time wasting meeting greatly increases the chances of those employees having to work overtime to accomplish a task on schedule, cutting into their family/personal time. Since most of these types of jobs are salary, there's no overtime pay. So yes, negativity is important in this matter. Why cuddle someone who wants to waste other people's time just to hear themselves speak and have some artificial self-important time?