Would you say more? What that suggests to me is the authority responsible for setting the max allowed said “Well let’s keep it below the threshold linked to can

Would you say more? What that suggests to me is the authority responsible for setting the max allowed said “Well let’s keep it below the threshold linked to cancer, reduce it by half for safety factor, and call it a day”. IE they chose one of the simplest possible approaches- doesn’t seem surprising, but I am probably missing your point.