I would argue that they have the _right_ to buy bread, but they also have the _responsibility_ to ensure that their child does not eat affected (or possibly-aff

I would argue that they have the _right_ to buy bread, but they also have the _responsibility_ to ensure that their child does not eat affected (or possibly-affected) bread. These labels shift the responsibility. And that is a responsibility that the companies making bread just are not willing to take.