Meetings are first and foremost about relationship management. You do not get to management and certainly not climb the management hierarchy if you do not at least implicitly feel this.
The actual meeting topic, while it can be relevant, is secondary. You establish and reinforce the pecking order, sense allegiance and subversion, or, feel out potential for reinforcing bonds or mitigating fallouts.
This is why people focussed on 'doing the actual work' hate meetings, while carreer focussed people love them.
Now I have exaggerated all the above, but only to make the point more clear. As always it is not black and white.
And sometimes, it is worse. There are realy situations with managers that schedule meetings and calls because they are simply bored at work. These are the types that when the step into the car to go to a meeting, will always have to get on the phone with some rapportee to have a quick 'update' that might just last the lenght of the drive.