Time off would allow people to relax, work on a hobby, exercise, etc. If you are feeling run down after working from a crappy, crammed apartment for 3 months, it can be refreshing to get an extra week or so off work with no questions asked.
Being single, you have time for all that in a normal week anyway. And if you don't you wouldn't have had the time for social interaction in the first place.
I'm sure to many being isolated and working non stop is worse than being isolated and having more free time.