This wouldn't even be practicable - pretty much every BigTech company has offices spread all over the country, if not the world, and the odds are you work day-to-day with someone who sits nowhere near you.
If you are forced to come in and you weren't allowed teleconferencing, you'd literally get nothing done.
The idea that you can staff whole teams of people (and their dependencies!) in a way that they're all guaranteed to sit within a short walk of each other is straight-up madness. Beyond a certain scale this is quite impossible.
Heck, even in the same city this isn't practicable. When I worked at Google we frequently had teams and their dependencies spread across building all over campus. Even if everyone involved sat in Mountain View, in an office, you still can't get away from teleconferencing since it takes half an hour for someone to commute from their building to yours!