There's no place to fish. You can't farm in a city.
People are trapped, and can't just leave on their own. They don't have resources to set up farms or other means of production.
They've had a tough life, and their mental landscape is not conducive to learning to fish.
Sometimes they just need help, and there's nothing you can do to help them except lessen their burden.
thanks for shering @gardenofeden
We be the change we wish to see in the world!