Perhaps you may be right in that reference - in an outside environment with construction crews, etc. Point being, in this day and age we have other means of working - and do so quite often for the convenience of making the modern world go on as it does - to all hours of the night. Artificial lighting, creative relaxation methods during breaks to boost morale, etc. (Including construction crews, etc. Just take a look at road workers, housing crews, and so on)
It is a nice idea, but entirely unnecessary in today's world.