Let's be honest: the entire concept of "Official State Things" is kind of weird and arbitrary.
Don't get me wrong; it's great for bringing publicity to state exports and recognizing cultural contributions, so that's all good and well. Things like state tree and state bird are all pretty commonplace across the 50.
But then there are a handful of states that have Official Crustaceans, for example. And of the 28 states with an Official State Beverage, 21 of them chose milk. Vermont is the only state with an Official State Flavor (maple, obviously). And in Arkansas, the ripe vine tomato is both the Official State Fruit and Vegetable.