I don't disagree that most people are terrible about summarizing and acting after meetings, but just to bring up a contrary stance: Occasionally this approach can be the result of a problem on the opposite side.

For example: Due to circumstances outside your control, you must work with someone who is ineffective, too busy, or simply can't wrap their head around whatever is going on. So you end up having to baby-sit.

In certain cases that will feel a lot like what you are complaining about, particularly when the opposite party is in denial/don't understand that they are the source of the problems.