My favorite is that you can find the same almond milk both in both the refrigerated and normal sections of the same store sometimes. Once food safety becomes ritual, it’s hard to shake.
Sometimes I just want almond milk to be cold right now. And also, the refrigerated milk section tends to be much easier to find than whatever place the store decides to put non refrigerated milks.
Consumers because they think of it as milk, and thus it should in the same section. Producers because they want that association.