There is a good reason behind it, although that's not what you are asking. You have framed this under the garb of curiosity and civility, whereas what you are really asking is no different from, "Why are Jews running the banks/Hollywood ?" The real reason, if you really want to know, is that there are strong markets, incentives, pipelines, and networks for certain trades that develop over time. Every trade or craft has these. In case of Canada (and the US to an extent), the international students are the ones subsidizing the universities by paying the sticker price. The universities get the money, and the students get an opportunity to study and work. The students will be mainly from India and China. Those are two large countries with rapid economic growth, ambition, and the ability to pay the price. And language works in favour of Indians. So that's how you get Silicon Valley and perhaps a lot of what you see in Canada too.