Thoughts on Store Bought Frosting, Smoothies, Semi Trucks

Through high school, and a few years after, I worked in a bakery. I've had plenty of experience with frosting and what goes best with various cakes and fillings, and what doesn't. Plus, I can make the delicious frostings from my old work, at home if I ever really needed. But I now wonder about store-bought frosting.

While skimming the back, I noticed in the section of "directions" they provide on how to best spread the frosting, the very last step was to store in the fridge for up to two weeks. And when I think about it, I don't know many people that have actually stored their leftover frosting in the refrigerator. Does anybody know of that step? I mean, frosting is pretty self-explanatory - unless you're making it from scratch. So what's the point of refrigeration? We've kept ours in the pantry for several months - handy for spreading on graham crackers for a quick snack.

Has anyone actually stored their store-bought frosting in a fridge?