Are you saying they love living in apartments? I think most of them live there because of proximity to economic activity, not out of love for apartment living. If manhattan allowed for single-family housing for 1.6M people, how many do you think will refuse that?
I'm saying that the people there like the benefits of living in a high-density area more than they dislike the downsides of apartments.
> If manhattan allowed for single-family housing
If Manhattan allowed for single-family housing for 1.6M people, it wouldn't be Manhattan. It would be Austin or Los Angeles, and the people living in Manhattan clearly don't want that because they haven't moved to those places.