Um... the photography is that way because the whole premise of the show is that someone is making a documentary about the people in the office. If the show had been filmed traditionally, it would have undercut that and wouldn’t have worked.
The photography didn’t bother me for a moment, by the way - in many ways, it adds to the humor, as the camera will swivel around and focus on a certain character as they’re being talked about.
It's also cheaper. Not having to set up multiple static camera setups for cutaways is a lot less expensive. It also cuts costs on post production and editing.
That style of videography also made the viewer feel as though they were part of the action.