My theory pertaining to non-technical supervisory staff is that meetings for some fill up an otherwise very empty day. All the technical managers that I have worked for never seemed too eager for meetings - they were too busy building real things to waste time in meetings.
What they never seem to realise is a 2 hour meeting with 10 people means they use two hours of their time and 20 hours of their subordinates, most of which is spent waiting for the other 9 to finish.
Lots of those managers simply don't see the inefficiency since from their point of view it looks OK.