Read the full article. Basically it's a cheat sheet telling people how to score well enough to graduate with good honours, and the importance of network. You missed out on her points 1 & 3 on how to avoid "pulling your CAP down" due to hard modules.

Street smart, yes. Useful, no. Give an example. I know of people who studied Life Sciences, but deliberately avoid taking any immunology modules as they know these are the killers. So they managed to scrap a 2nd upper. But when people start to talk to them about biomedical issues, they scratch their head (as they don't understand), leaving these people bewildered at how they gotten their degree. Reason being you can't talk in depth about biomedical stuff without touching on immunology.

Conclusion, foundation will not be strong if you constantly choose the easy way out. Good universities design their curriculum in such a way that you get the best out of it. And there you have people trying to play the system. Time will be your test to see if you're geniunely good, or just good at smoking.