Earlier quoted context omitted.
That was really not the focus of the doc. As the title implies, they wanted to take a peek in the interesting ideas going on in his mind right now.
I was hoping we we would find more "Inside bill's brain", then just toilets.
Toilets are one of the reason why we left a past of disease and death from sewage contamination.
Yet open defecation is a problem in so much of the world.
So this is exactly what I wanted to see how he deals with. A hard problem that is so vital. How does his brain tackle that. Especially how it's unlikely a computer problem
But they did totally miss the mark on talking about it, it was what I wanted exactly to see and was disappointed it was so disappointing.
Maybe we couldn't tackle it. But I have seen other specials where he had made a unique start on the problem.