Many did not want to leave, for want of having better options.
The dentists were especially attached to the place.
>Medical and dental care were no problem at all: many of the residents were doctors and dentists with Chinese qualifications and years of experience but lacking the expensive pieces of paper required to practise in the colony. They set up their neat little clinics in the City, oases of cleanliness and order, and charged their patients a fraction of what they would pay outside.
Source: City Of Darkness: Life In Kowloon Walled City (1993)
>Medical and dental care were no problem at all: many of the residents were doctors and dentists with Chinese qualifications and years of experience but lacking the expensive pieces of paper required to practise in the colony. They set up their neat little clinics in the City, oases of cleanliness and order, and charged their patients a fraction of what they would pay outside.
Source: City Of Darkness: Life In Kowloon Walled City (1993)