Common sense is not so common these days. People are sheep.
Teachers can't teach skills they don't have. Very few teachers or professors have what it takes to be successful business people or problem solvers. There are some, and those are the ones who stick out among a mediocre flock of public servants who can barely keep the kids in their seats and keep them from talking during class.
Schools should be teaching children how to educate themselves but the system was designed around the turn of the previous century to turn out compliant factory workers and is not up to the modern challenges.