Programming jobs since the 90s were offering a much better pay than pretty much every other job. So parents were pushing kids to pursue CS degrees. With complet

Programming jobs since the 90s were offering a much better pay than pretty much every other job. So parents were pushing kids to pursue CS degrees. With completely free or very cheap education this created a lot of competition for such degrees. And with math exam being the only deciding factor to get accepted, only people who were really good at math and really well prepared were getting in. Sort of due to the lack of other opportunities filtering the most capable and the most motivated.