Some people have no life outside of work. When you live in a country where you need several jobs to make rent and afford food, I'm guessing this is the standard.
Edit: gee, I guess I hit a nerve? For the record I'm from the country where working hard is illegal, as the joke goes. And very badly that we have antiallergique laws to protect our rights to have a life outside of work. And even here we have to fight tooth and nails to get WFH :/