What are some of the most major benefits you've found from coming into the office every single day?
In my experience, it's waaaay more efficient for developers to be in the same room if you do it right, though I'm starting to think I might have a minority opinion on that.
There are plenty of cases where better documentation, training, or other means of communication would provide a higher bus factor than always relying on pestering another dev. Also, with video chat, it's harder to believe that it is so difficult to meet or plan without being in the same building.
There are some big picture, architectural design discussions covering many interrelated components that can benefit form in-person meetings but those kind of meetings are the exception and not the norm in my experience.
Because it's rare that you do.