Whatever that means - only yesterday (https://news.ycombinator.com/item?id=35391868) the fact that US life expectancy on average is the same as the life expectancy of the citizens of Blackpool, England was discussed here. Blackpool is the most deprived city in the country, and that really says something - England isn't rich and has many post-industrial wastelands.
Your statement is reminiscent of the prophet Ezekiel and his "Defiled Bread" (Ez 4:12-17), as that passage is called. Instead of human feces, Ezekiel got to use cowpats, but unlike you, the prophet still found it disgusting.
First time I hear of that theory, do you have any references into the literature?
I have always interpreted the passage literally, as a reenactment of what the citizens of Jerusalem would have to endure while under siege by the forces of King Nebukadnezar.
Cowpats are what poor people used as fuel. It was a common practice in India till about 20 years ago. Mix cow dung with hay, make it flat, dry it and you can use it as fuel. I am sure it is not India specific thing.
The same cowpat is also used for to burn the offerings in the temples.
Your statement is reminiscent of the prophet Ezekiel and his "Defiled Bread" (Ez 4:12-17), as that passage is called. Instead of human feces, Ezekiel got to use cowpats, but unlike you, the prophet still found it disgusting.