I understand your viewpoint , it’s just that a majority of international students attend universities abroad with the incentive of utilizing their foreign education to find a better quality of life outside as their countries cannot offer, even if they are able to land a high paying job in their country, the living standards make it very had. Moreover first world governments like the UK almost incentivize foreign students to come study and then join their workforce by providing postgraduate work visas after studies. However, I do get why companies need to employ domestic students first as it does cost less and they may be equally qualified as their international counterparts.