re: Bell is clearly not an engineering systems analyst as nearly every assumption he makes is wrong.
You miss my point. A systems engineering analysis would look at production systems true, but would also factor in x-planes and there frequency. It's like insurance underwriting and Bell showed no interest in being honest with numbers. Adding the Me 163 would not have helped that problem.
BTW, the Messerschmitt Me 163 was just as experimental as any of the X-planes and pushed into production by the last gasps of a failing side of a war.