They cost MP to summon. If you want to summon them, go right ahead! We don't stop you from doing that in the Skill tab. However, as part of breakfast, most people will choose to NOT spend their MP on them. And that is why the "honor path restrictions" setting is in the Breakfast settings.
lost makes a good point, though: I don't see much point in pruning them from inventory. If I'm in Oxy, I am not going to look at the Food or Booze tabs, but I want to see my inventory...