How odd, John, the produce section source of origin labels I reference at the two grocery stores we frequent read like the member list of the U.N.! Arsenic content in domestically produced rice is largely a function of the background soil levels it is cultivated in. Very little winter produce is hot house grown in Canada or the United States, outside of tomatoes. You can rationalize your personal risk; read-in, or read-out, however you wish. This doesn't alter the composite risk actions you incur.
As Vince offered, healthy people die every day: just generally not at the same ages as the unhealthy cohort they would be contrasted against, for the statement to validly reflect a broad array of existing epidemiologic trail data...composite risk, oddly enough, does add-up, frequently resulting in adverse sequelae. Whether the relationship is strictly linear or curvilinear is, as well as the rate of inflection induced in the resulting function, via the array of independent variables chosen, remains a point of continued focus and interest.