Well... I have a counter example of a failure in FOSS, because of remoteness of the responsible department:

At IBM working in a satellite office, I wanted to contribute to Jenkins. The fact that any person with the authority to allow me to do that was "behind an office door". Multiple emails back and forth - I ended up ditching the idea of getting the approval and quit IBM.

Closed doors should be for focus time, which should not be "all the time". Having small team offices and quiet rooms - can contribute to people's ability to focus. But personal offices is just another door that stops people from collaborating will inevitably stop a lot of valuable collaboration.