It was interesting to me too. I'm autistic, so I'm used to communicating with people focused almost entirely on their faces, not giving or receiving many cues from the rest of their and my body language.
But it turns out most people depend on being able to read and send those nonverbal signals subconsciously with the rest of their bodies to get their points across, and not being able to do so is exhausting for them. It's easier to communicate by phone, where that limitation is expected.
I'm not sure how it can or will, but I'd love to see this Zoom fatigue motivate people who are used to having a wider array of communication methods available to them figure out how to capture that in remote comms.