More German Logic

So I don't understand some of the "logic" here. Okay, so the pediatrician told me to give Gerrit flouride pills because Germans don't put flouride in their water like they do in the U.S. Okay, so why not just give him flouride toothpaste like adults use? "No, no," he says. "Kids swallow toothpaste instead of spitting it out and you don't want him to swallow flouride toothpaste." Hmm... so does anyone else see the irrational logic here?