What is it “they” say? What doesn’t kill you makes you stronger? Do you think that includes eating food off the floor? How about for kids who eat Cheerios out of the pile you’ve just created by sweeping up after lunch? You turn around for a second to get a dustpan and whammo! Like bees to a flower, they are there, ready for an after lunch snack.
Not really MY choice, but I suppose they could be putting worse things in their mouths.