Chairs are lined up in an office. A person is seated in the back and the boss is at a desk at the front.
There are too many chairs in the office. It makes no sense.
Why are there so many chairs lined up here?
What makes you think you were not our first choice?
scene: an office description: Chairs are lined up in an office. A person is seated in the back and the boss is at a desk at the front. uncanny: There are too many chairs in the office. It makes no sense. entities: Queue_area, Chair. caption: What makes you think you were not our first choice?
Jobs sometimes make offers to top choice candidates before others. Here, the boss has literally lined up his preferences in chairs in front of his desk: the person at the back of the line is the only one remaining and has figured out that he was the last choice. This is a play on the feeling of not being wanted by an employer, and them not being forthcoming with the idea that others were preferable (but didn't join).