Assume for a second that your goal is to teach knowledge, as you say.
How are you telling whether you are successful at that?
Even if you do not care about the personal individual achievement level (or whatever) of the students, you still need to be able to measure to understand where you are successfully teaching, and not, so that you can change/improve/etc teaching.
As the comment you replied to said, you can't just wish these problems away, and they are not easy things.
The overall thing is not a problem, they are systems.
They can't be "solved" through simplistic answers
How are you telling whether you are successful at that? Even if you do not care about the personal individual achievement level (or whatever) of the students, you still need to be able to measure to understand where you are successfully teaching, and not, so that you can change/improve/etc teaching.
As the comment you replied to said, you can't just wish these problems away, and they are not easy things.
The overall thing is not a problem, they are systems. They can't be "solved" through simplistic answers