The entire quote doesn't actually say anything about 'bad meetings', it says that you should leave when you are no longer contributing to one. How many times h

The entire quote doesn't actually say anything about 'bad meetings', it says that you should leave when you are no longer contributing to one. How many times have you sat through an hour-long meeting after your 5 minutes of review/updates are over? That's what he's talking about - if you're clearly not needed anymore, you don't have to stay in order to be polite.