Because mostly living alone is a nightmare.
Living away from your family can be difficult at times. Especially, when you are living alone. You never know what difficulties in the form of spider or any other fatal creature you might face.
Hence, the idea of getting a roommate will sound all too wonderful to your ears.
Take it from a person who tried living alone. It. Is. Not. Easy.
Recommended story: 12 Worst Roommate Ever