Because ESP, gestures, and pheromones don't work over Zoom? I'm not buying this.
Also, you've moved the goalposts again. The GP suggested video. Not writing a book in Markdown.
Yes they don't work unless you have a company/team policy of "everyone must turn on their camera 100% of the time". You can say something in a meeting with 14 people, take a quick look and see 10 people nodding and 4 perplexed (or 4 people nodding and 10 perplexed). Can't do that with 14 static avatars.
As far as I know no company has such policy. When a team in my company tried to enforce it, their manager got a quick call from HR saying they can't do that.