People will always find greener pastures as much as they can. That's human nature. So it is understandable that people will find alternatives how to improve their economic status in life.
They have to because if they won't, their quality of life won't improve. And if there is no livelihood from the rural area that they're living, they will be stuck to the typical life that they've grown up with. These people have dreams to fulfill and reach and that's why they're also going from the areas where the greener pastures can be found. It's normal to have a better life and reach it through the means that you can do even if it means leaving the past of your life in that rural area where your childhood has always been.