I suppose this is directed at people who work in restaurants. Mainly the dinner shift cooks who get home super late at night and the chefs who work ungodly hours(50 hours a week and up, YUCK!).
I won't say that I do all the time, but I will fire up the grill at midnight, make a soup or get the crock pot going before I go bed. A lot of times I find it very relaxing after a long hard day on the line to come home and make something in my own kitchen that I really like to eat.