Surely by now you've heard the aphorism "It's who you know and who you blow"? You can't possibly be implying that most people are in their current jobs because

Surely by now you've heard the aphorism "It's who you know and who you blow"? You can't possibly be implying that most people are in their current jobs because of skill or training?! Bwaahaaahaaahaaah! Such naivete! Where have you been hiding?