This will not give students the best return of their investments. Some will learn on their own just from trying. The only service the instructor facilitates is some basic safety instruction, warm up, and the Dojo and organizing a group to wrestle around with for fun. The road to becoming self defense proof is behind the rising sun.
Demonstration, Explanation ensuring students follow the correct intensive training steps for maximum efficiency and effectiveness, build up to instructed light sparring where students are instructed to test all the techniques in a prescribed manner to facilitate efficient and effective learning.
Civilian Krav Maga has one point of emphases for each technique as it was taught by Imrich in his civilian dojo, followed by his students including those few that taught in the IDF totally more intensively.
The idea of giving one or two important points of emphasis is invaluable. However not taken in a prioritized context they might get someone off track if they are not the most important ones of top priority.
If they plan on keeping knowledge to themselves and releasing it slowly then this is what they do. If their instructor planned it for them, then they do it even without planning on it!
The Fitness Factor:
Traditionally people look for physical activity that will put them in shape for health and physique purposes make them look more attractive and more confident in their social and work life. Some people have the time to do variety of activities and some competitive based and some skill based. Some switch activities every year or so to get the broad benefits of each activity.
The Fitness Factor Conflict:
Fitness Instructors learn to get people in shape by coaching them personally and encouraging them to use their body in various activities and ranges of motion to promote competitive athletic achievements, and personal fitness health with the control of muscle heart function, and healthy metabolism.
One thing is for sure: Unless they work as a professor in a Physical Education university, they will never teach anyone how to become a Physical Education Professional.
That mentality, they would be inclined to apply if they got into the business of teaching Fighting Arts including Krav Maga especially if they only learned few techniques of Krav Maga without knowing it in depth and its principles.
The use of Fitness Instructor in the IDF is to motivate, coach and bring their soldiers to their maximum potential of combat fitness by building the soldiers gradually.
Since teaching Krav Maga is ensuring your student will react appropriately to a dangerous intelligent Human that is trying to kill him, students needs to have the software stored in their brains and have access to use it. It is not a dog training process that overtime keeps his body in shape until the end of the season. It is a skill learned for life.
Instructors need to know all the components of fighting capabilities. They need to know how to teach them and need to teach them as well. If there is a gray area they are unfamiliar with, or miss in teaching, their students have a big gap in their defense potential.
As a student you really need to ask yourself are you really at ease handling a potential serious threat, and is your heart in it, but besides your heart, is your brain in it, and will you probably prevail?