Hypothesis: 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.
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Based on 2022 data, rates are lower is US compared Japan, Russia, Italy, France and UK.
https://www.wcrf.org/preventing-cancer/cancer-statistics/col...
Maybe that implies more dyes, additives, pesticides, supplements in poultry/beef/pork in those other countries?