Rightbase
I would acknowledge all your conclusions. I don't see anywhere that you think it is ok, this water in fuel. That leaves sumping after melt at a suitable location. Because something is difficult should not mean it gets a box checked, because to eliminate the water isn't 'easy' ...
It is the tolerance of water build up in 038 over time that is the problem; Boeing had to inject water into the fuel to reproduce the accident conditions.
Will