Technet101 asked:
"Given a choice....of either landing on top of a building or taking the aircraft to the street (neither of which are first choices), I think the Street would be the choice most of us would have made."
People in the street would steer me away. A rooftop might appear to present a less dangerous option than exposed people. Who knew the roof would collapse into a crowd?
Sometimes you have no good choices and take the lesser of the bad ones.