Yeah, I think that a key point here is that it is a way of keeping meetings on track with larger groups. Once you have a bunch of people who have strong opinions about the current topic of discussion, then you will get times when multiple people want to express themselves at the same time.

The person running the meeting may then have to step in and act as traffic cop, but they can only be reactive, after people start talking over each other or whatever. It can take a combination of a good chair and mutual goodwill to sort out the communication traffic jam. It's also rough on the people who aren't assertive, as the article says.