For the fifth time on HN:
Manhattan is the most dense housing in the US. The vast majority of Americans and most visitors to the states don't live in anything comparable. Further, unless you live in a prewar, lots of housing in Manhattan is pretty inexpensively built -- especially anything dating from the 60s and 70s, of which there is a lot. Little concern was paid to sound insulation, and often the walls between neighboring apartments are no thicker than the walls between rooms. Thus, people are much more circumspect about the noise they make and their behavior in order to live and get along in such housing.
Further, long term tenants know they will have to see and get along with each other so there are further incentives to not being noisy or obnoxious.
On the other hand, short term tenants often want to party and have no such incentives not to be shitty neighbors. This isn't merely theory but also my experience living next to a short term place in SF. Thus, many denizens of NYC and SF do not want such neighbors.
Further, long term tenants know they will have to see and get along with each other so there are further incentives to not being noisy or obnoxious.
On the other hand, short term tenants often want to party and have no such incentives not to be shitty neighbors. This isn't merely theory but also my experience living next to a short term place in SF. Thus, many denizens of NYC and SF do not want such neighbors.