I can see the argument that young people aren’t being exposed to older peers the same way and their learning may be stunted.
But… I haven’t set foot in an office for five years now and I’m as productive as I ever was. Possibly more.
As for his “people are distracted during meetings”, perhaps there ought to be more focus on only holding necessary meetings, rather than dragging people in when there’s no reason for them to be there and nothing to hold their interest? In my experience that’s the cause of a lot of the snark and slacking.