You're not being realistic. For me, it puts into question all your other statements about the reality of conflict outside of a gym or a dojo.By most students. Any art that cannot adapt to the weaker defeating the stronger is a waste of time. The body has disabling and lethal target that a child has the strength to exploit. Proficiency based on outcome is the only standard that makes sense. Otherwise, all the training is wasted. Read books by people like Rory Miller, Tim Larkin and Varg Freeborn. One of Larkin's students was a small college girl who only took a three hour seminar with Larkin. She later killed a serial rapist who attacked her and was much larger than her. She broke his neck with her bare hands. Nancy Wake, "The White Mouse" spy against the Nazis was taught the Fairbarin-Sykes H2H system and she later killed a German officer with one chop to the neck.
If you are satisfied with "proficiency" meaning anything less, that is your call. For me, it puts into question all your other statements about effectiveness of a martial art.