Depends on the kind of course.
It's proper to use the rate of successful course completions as a factor of instructor evaluation. The instructor is not there merely to consume oxygen but, in fact, to do a specific job: Train troops. If no troops are getting trained, clearly the instructor is the common denominator of all those failures.
When the need was mere memorization of a fact, yes, the instructor would explicitly point out which facts
needed to be memorized. Not sure I see a problem with that.
In most cases, people in the military are in training programs that they have the capacity to pass. The intent and expectation is that they succeed in being trained.
In other words: The intent and expectation is an
equal outcome, that everyone end up capable of passing the final examination, text, exercise, whatever that might be. Or combat.
Reaching an equal outcome with students that start out with varying capabilities means varying levels of instruction to get there. So students help each other study, help each other drill, help each other do what's necessary so that they all can succeed.
As they said in my day, "Cooperate and graduate." Or as scripture puts it:
Our desire is not that others might be relieved while you are hard pressed, but that there might be equality. At the present time your plenty will supply what they need, so that in turn their plenty will supply what you need.
The goal is equality, as it is written: “The one who gathered much did not have too much, and the one who gathered little did not have too little.”-- 2 Corinthians 8
The goal is that
all get over the wall.
The last soldier is the strongest--who makes sure all others get over first.