TFA only elaborates on 2021. But are the current numbers for "bosses" really that different from, say, 2018?
Over the years I worked with several good "bosses" and they regularly were off site talking to customers, "bosses" from departments in other regions, exploring opportunities with people outside of the company, haggling vendor contracts etc.
These are also activities where it makes sense to meet in person because the topics are vague, conflicts can arise and things can become emotional, so one would want more information than just a washed out face and a robotic voice in a video conference tool.