Yeah, but it's kind of bullshit advice, too. It's not specific enough. "Unnecessary meetings" - how do you know for sure it's unnecessary? Etc.

I'm guessing with experience? When you've had a dozen of the same meetings or "emergencies", you tend to know which ones are actual bullshit.

Well, then you would most likely not take them even without this advice, hence my point the advice is not very useful.

You know its unnecessary if the meeting can start without you.

You know it's unnecessary if you didn't have to say a word during the meeting.