It's true that a Chef must a be a good manager, and in order to survive, generate a profit, but no, he/she must actually KNOW how to cook.
If the Chef thinks that poaching is to drop a cracked egg into boiling water, odds are that the whole kitchen can't poach properly either. If the Chef figures that "saute" means to toss par-cooked pasta in a ready-made tomato sauce, odds are that the whole kitchen understands that that process is incorrectly called "Sauteing". Basically the leader, the boss, the chef, whatever you call him must understand any job thoroughly before he gives that job to his/her subordinates. If he doesn't, he can't inspect the job properly either because he/she doesn't have the full understanding of it. Incompetance, I think it's called. This is why armies around the world , since the concept of war, have had boot camps, and selected officers only from those who finished boot camp. If they didn't, they'd have lousy officers, alot of dead men and a few mutinys on their hands.
But I digress, badly...Like I said this is a typicaly N.American problem. In Europe cooking is a respected trade, and acknowledged by federal Gov'ts. To become a cook you must complete an apprenticeship, there are very few private cooking schools, and those that are are not geared for professionals. The apprenticeship is viewed as a a seconary education, like highschool, so there are standardized tests, resulting in that the book learning is the same for every apprentice. Apprentices can only work under those who have succesfully completed THEIR apprenticeship. Trained elephants training the trainees. What you have now is a level playing field, very consistant education, and from this you can go on your way to becoming a Chef, or as high as you want.
Compare this to N.America where you can work anywhere you want to, with no guarantees that that Chef actually knows what they're doing. You might work at a high-end steak house and learn how to grill and saute but have no idea how to braise or poele. Or you could go to a cooking school, many are private run. But there is no consistancy BETWEEN these schools, what is curriculum for one school is not curricculum for another, what is acceptable standards for once school is not acceptable for another.
There are no national standards.
This is the problem.