this is apparently a very difficult concept for people to understand. What you wrote is true of every class at any time. That is why people fail classes everywhere.Or that person is just not in the place to pass that exam/test at that given time.
When you design a curriculum, your goal is to design a class so that all properly screened students who do what is expected of them will be able to complete the course in the identified length of time. As I mentioned elsewhere, You do not expect people to pass Calculus I in a week. There will always be people who don't do it, but if the number of people who don't succeed is high, you need to look at the reasons. It may be, for example, that you are expecting students to make too much progress in the length of time you have allotted for the class.
When I took my cave class (the specific class after Apprentice Cave that is often called "full cave,"), I had some trouble with exiting a very high flow cave cleanly (pulling out the reel specifically), and I needed a day beyond the expected advertised length of the class. Having me come back the next day was the right move. If it were to happen to a large percentage of students, the instructor should ethically advertise a different class length and adjust the course fees accordingly so that students knew what to expect.
In logic, we refer to this as a weak or false analogy. The purposes of a civilian training course and an elite military unit preparation are entirely different. A course teaching paying students assumes all students properly in the program can pass the course if they work appropriately and are given proper instruction. That is different from military training designed to weed out the lesser capable people and identify elite fighting units with skills that can only be achieved by a relative few.Great theory, but it is only that. We see 85-90% failure rate when very qualified soldiers attempt to complete BUDS. Should they redesign that course to have more people pass, regardless of the quality of the passing the course?