[developer93]

There's a certain self selection in that people who are motivated and brave enough to move counties for a new life are the only ones you see. Back home there are also people who are resigned to their position (or getting money from the ones who have moved). Moving to a developed country from a developing one as someone unskilled takes a lot of effort and determination and luck (for skilled people to a certain extent too), so there's a survivorship bias here.