With haven's multi combo food system, it takes a lot of effort to find recipes that are of high quality. But all it takes to copy one is to see it once. That means people can't sell foods that are from made easily found ingredients without immediately losing the investment into figuring out the recipe. Although I've been told it's fixed, "Double chived chicken" was an example in previous worlds, and in this world smoked foods definitely qualify. The effort lies heavily in figuring out the good combos, while the ingredients are relatively accessible.
If we had a way to hide Food ingredients/recipes, it opens up the ability for people who want to sell foods without sharing the recipes. Maybe making a sandwich out of food+bread that simply copies the FEPs/Hunger and doesn't display ingredients? Now, and in past worlds, I actively don't want to sell anything other than static foods like cheese because of this.
Edit: I would swim to sweden to punch someone if this is interpretted as "remove all variable ingredient displays on food items". Just a convenient way to make, as Vatas said, secret recipes (with some form of UI interaction that isn't horrendously annoying).