No, you are quite wrong indeed.
There are bad students out there, we do not live in a perfect happy smiley little world where every human has limitless potential and can do *anything* if only they tried and had good teachers. That nonsense view comes out of what political correctness has done to modern western society.
There are students who truly are unwilling to learn, dont want to be there, and are only in class because they have to.
There are actually students out there who will never be able to pass certain exams, no matter how good the teachers are and no matter how much they try. Some things are just beyond some people.
The *real world* is not perfect, humans are not perfect.
If you think that is a cynical view, well then that is utterly irrelevant to my point. Facts are facts, no matter how much we dont or do like that fact.