Oh, I don't know. How about the very real need for sunlight, fresh air, and space?!
One can exist in confinement, but usually must be driven to it.
Coober Pedy is a town in northern South Australia, 846 km (526 mi) north of Adelaide on the Stuart Highway. According to the 2011 census, its population was 1,695 (953 males, 742 females, including 275 indigenous Australians).[1] The town is sometimes referred to as the “opal capital of the world” because of the quantity of precious opals that are mined there. Coober Pedy is renowned for its below-ground residences, called “dugouts”, which are built in this fashion due to the scorching daytime heat....
https://en.wikipedia.org/wiki/Coober_Pedy
Interesting town. The underground housing is actually pretty nice. I was in a place that even had an in ground, indoor pool off the living room.