1. You can show beautiful scenery from the rooftop.
Since the late 1990s, more protagonists have been poor and live in rooftop shacks. In reality, most people who are too poor to afford a decent home live in the basement, and the number of rooftop homes is declining as hillside villages disappear from cities. But rooftop homes are visually appealing. You can’t move the camera around much in the basement, but from the rooftop there is some fine scenery to be shown.