What they tell you at college and what they tell you in the business world are two different things.
The colleges are being paid to tell you what you (or your benefactor) want to hear. The business world isn’t, the business world is doing the buying this time. Different rules.
At first it can feel a bit depressing. Don’t worry, after a while you get used to it and after a while, you start finding it frankly quite liberating.
