Video calls are not an adequate substitute to in-person communication
Slight inconsistencies in digital communication create incredibly frustrating experiences. With video calls, the lag, and lack of spatial awareness that is central to in-person communication creates a mismatch of expectation and shortens the Opportunity window for spontaneity.
As well, it is not natural to be looking directly at everyone taking part in a conversation. Even in a 1:1 conversation often you'll be sitting or walking side-by-side and not looking straight on at the other person the whole time. Looking directly at each other makes silence awkward. There is also an inability to make eye-contact or properly look away (point your attention to some object in your shared environment), which creates an unnatural situation which can leave you feeling much more exhausted than in-person interaction.