I think I've explained things in a simple enough manner, if any more is needed, I'm glad to help.
sw
I think you've explained things as simply as reasonably practicable (ASARP).
It would be fair to suggest that the risk methodology you outline is considered best practice in safety & engineering circles. Those who mock it should understand that in doing so they are therefore destroying their own credibility.
Any here actually KNOW if you could put effective fire supressant technology into a hugh drafty space like the nimrod bomb bay and what it would take? Intuitively it sounds totally impractical to me, though it would be interesting to know how it could be done (if at all).