alt Hacker NewsHypothesis: The American diet contains more carcinogens (dyes, additives, pesticides, supplements in poultry/beef/pork) and therefore USA is is more need of CRC screening.
USA generally has higher CRC rates than other developed nations:
https://pmc.ncbi.nlm.nih.gov/articles/PMC2796096/
the screenings may make sense, here
I think that article is from 2009. Need something more recent. Also it mentions that as countries become high-income economies, the incidence rate increases.