Food fraud is a substantial problem.
Though it doesn't pose much of a health risk -- food is still food, after all -- the consumer is being deceived. If you ask for a really expensive fish at a restaurant, you should get that fish, not a cheaper imitation. Likewise (even though we think organic food is a waste of money), if you buy something that is labeled "organic" at the grocery store, it ought to be organic. That's simply a matter of honesty and truth in advertising.