lol what are they doing? Staring at the ceiling? What makes them always available in the office and not always available at home? How is this still a thing being discussed? Perhaps, at home, they are actually able to get some work done.
Again, this is my office. I'm sure there are some offices where people legitimately aren't doing much of anything at home. Statistically, that just has to be true. Maybe this is the wrong company?
I remember, way back in like 2012? 2015? Not sure when exactly, but we visited the office of a contractor we were working with, and they had a flatscreen on a stand in a public area with their lead developer on webcam, working from home. I don't know how everyone gets so utterly myopic that they forget you can just login to a videoconference (or IRC in the olden days) and just be available for these "quick chats" Bonus, if you need uninterrupted deep focus time, you can turn it off at your end.
And email, did we suddenly conveniently forget about that? LKML and countless other FLOSS mailing lists are proof positive that 100% remote can indeed build any scale of software.