It is the mass of simple and complex ideas that were brought to the table or extracted principles that posed a great confusion to students. Krav Maga principles were tested both in the sports arena and in street fighting.
It is now taught mostly as a non competitive Self Defense Training System. It just happened that a genius mind was able to extract the essence of fighting and prioritize the training drills, principles and application principles and distill them for the Self Defense Purpose.
Not all students are alike and not all instructors are alike, but once you have a system where there is a great similarity between the students and instructors, it starts to make sense. Names of styles and fighting sports only describe rules or non rules of purpose but never are good indicators of a training system.
When Instructors or founders do not have precise requirements of how to convey their training system to future generations, or when names of styles get borrowed or stolen, the training system cease to exists.
If you think about the idea of solving the puzzle of human fighting capabilities, think about the smallest particle, the least amount of time and how to have the most power to change things. Do not think circles, squares or Triangles.
It is not a lesson in geometry but lesson in concepts. It is much more complex and needed to be broken down to the last component and put back together to a working condition. It is true that athletes have to conform to world wide ratios of achievements like time KO rate and number of fighting experiences, while the time of running under the same conditions (flat and straight track) can be measured universally, humans are much more complex, so fights won with many opponents, just tell you that you were better then them at that time, but not all the time why.