One of the main reasons people come to study here is that they couldn't make it in their own country. Their grades are too shit to study at a decent school in their country so they come here, because having an "international education" is seen as better than a low tier school in their country.

A lot of them have sub-par English skills and try to cheat, get people to write their essays or even do entire assignments for them.

So you get these entitled, rich (in their country) morons coming here to study.

The other reason is it is a fast track to immigration.