Most robberies happen during the day when people are in work and streets are noisy. Attempting to rob city house in night sounds like even more stupid thing then daytime robbery.
There are valid scenarios for robbing during the night - for example in many holiday destinations with villas, holiday apartments etc. it is expected that when there are people inside the house, there is also cash money, laptops, tablets, smart phones and other small easily carriable items with value worth the effort available.
