I did not downvote, but I think your comment is a good example of the "Yes We Can't" feeling that I mentioned in it being too hard to change things.
Manhattan wasn't exactly easy land to build on either.
Manhattan also has an inherent economy of scale that Hoboken lacks; Hoboken is barely over 1 square mile of land.
Meanwhile the lower-rise neighborhoods of Manhattan have roughly the same population density and building height as Hoboken. So why are you calling out Hoboken? What single-story buildings are you even talking about there, and why are you ignoring the presence of single-story buildings in Manhattan? They're rare but they absolutely do exist -- I just ate lunch in a single-story Manhattan building literally yesterday.