Ask HN: What’s the deal with executives having a “not” personal office?

I’ve noticed at two larger companies, that I worked at, with an open office plan the each executive would get a conference room just for the executive. They would decorate it, add a couch, remove the large table, and install a mini fridge while still having a desk on the floor, but never spend time there.

Why don’t they call it their office instead of a conference room? We can all see it.