PB, one of the larger and more exhaustive studies was conducted in NZ which isn't exactly a a 3rd world nation. One of the governments currently reviewing its circ recommendations is the US, once again not a 3rd world nation.
The factors leading to increased transmission of disease have nothing to do with how often circed men clean their smegma out.
For me dismissing such a large body of evidence is kind of like saying that we don't need driver education or air bags because we have seat-belts.
As I said previously safe-sex education is a great idea however it has a history of failure.