If you want to find out which higher education system is the best—as opposed to the most popular—, asking people who haven't even studied there is a terrible idea.

The education space is full of scams using perceived reputation to prey on students who don't know better. The US even set up a fake university without classes https://en.wikipedia.org/wiki/University_of_Farmington and people still signed up because they couldn't tell the difference.

If you want to evaluate education quality, look at people who've gone through the system and how they're doing afterwards.