I fully agree. But would then also suggest to ban the use of cars in any crowded city.
Haha, but the fact is some places are trying to do that, or at least make the option so expensive it's not that attractive. Ostensibly for other reasons, of course.
I flew some helo shuttles from southwest Houston to IAH back in the 80s oil boom. About 12 minutes, it sure beat the traffic (by road it would have normally have taken at least 60-90 minutes). No rooftop landings, though I think one may have been on the top of a parking garage in the Galleria area. Nowhere near as tall as the PanAm building, but great stuff. Nice memories of another era that seems to have all but disappeared.