Unless you're engaged in a high-stakes commercial negotiation, for example. The sales people in those are always on camera. The lawyers are routinely off. Part

Unless you're engaged in a high-stakes commercial negotiation, for example. The sales people in those are always on camera. The lawyers are routinely off. Part of that is a long, looooong history of negotiation via conference call, while part is wanting to be able to roll our eyes at the other team's posturing without being caught.