Actually I had a friend who was swiss when I was doing my PhD in Canada, he was able to get his Canadian citizenship as a post doc. Not to mention all the other people, Iranians, Chinese, Mexicans, Indians, etc who got their Canadian citizenship while doing a PhD. It's really not comparable, you just have to live in Canada 3 of the last 5 years to be eligible for citizenship.

You can also become a permanent resident of Canada easily as a university student. If Switzerland had the same rules as Canada I'd be Swiss by now.