The thing is that there is no arrangement that works for everyone. Sure, those who just want a physical office space instead of their home will probably be ok collaborating remotely, but the others want to collaborate in person, and that requires everyone to be at the same place. Flexible conditions which make everyone happy is going to the office to spend large amount of time on video calls in cramped call booth - nothing too happy about that, whichever side of the debate you're on.