Doesn't that betray the notion of remote work and remote offices being as efficient as on-campus work interactions, or is there something about the units involved which make them exceptional in working under one roof?
That notion is not very accurate. There is lot of value in teams being colocated.
I agree with your notion. However, lots of people and organizations make contrary claims. So maybe there are some kinds of teams which can perform relatively well as a dispersed team.