At some point in your life you may have a baby. You might decide to breastfeed said baby. And imagine your joy when you discover your baby is very sensitive or allergic to a million different things, including dairy, soy, and caffeine. Oh, and did I mention you also are into your third month with thrush, so you're still trying to stay away from anything that will feed yeast, ie. anything with sugar, grains, yeast.... the list of things you can't eat or drink goes on and on.
Now imagine that although you used to have a fairly healthy diet that did not really include any processed foods anyway, now that your milk is the only option for nutrition for your baby until she is at least 6 months old, your new and improved healthy diet feels a little restrictive at times. You might even find yourself starving while grocery shopping, and suddenly feel desperate to eat something you did not make at home. Lo and behold, you come across a package of cookies in the organic aisle. Nut-free! Dairy-free! Soy-free!
You will think your ship has come in, and will throw those $4.99 cookies in your cart without a moment's hesitation. Well, let me tell you something. Processed foods that are nut-free, dairy-free, and soy-free are also taste-free. Do yourself a favour - go back to the produce section and buy an extra apple. Sigh.