In the last year I have 'attended' several training sessions over videoconference. The only ones I got a lot from were those where the lecturer and the participants all knew each other to a greater or lesser degree. It was much more interactive and therefore the quality of the learning was greater. The sessions in which I knew no one, I kept quiet and as someone has said above, I felt like a spectator.
How do you go from the latter to the former? You have to meet them face to face.... Meetings will return and business travel will return; maybe in a different way, but it will return, otherwise connections will be lost and therefore so will business.