I venture because, while it's not simple, it's easy. Or, while it's not easy, it's simple. It feels like a real 'hard nut to crack' that people can get in to computationally, but I agree, it doesn't solve much (at least for shopping scenarios).
And yes, also agree - recipes, mixing with what you've got at home vs at the store - good idea. Additionally, just recipe suggestions based on scanning an item. If I scanned pears and salmon, having a mobile app suggest 5 other things to buy that would make a great <whatever> (I'm not a cook - I can't think of what I might cook with that) - that would help clueless people like me do 'real time recipe discovery' when I'm at the store. Thinking I'll do this somewhere else, build up a 'list', then share it or look it up when I'm near a store - for me, no dice.
Perhaps that's where grocery list apps all plan to go, but I'm not sure why they don't start on that end first. Or perhaps some have, and my discovery on this is so bad I've never found one.
EDIT: From TFA
"AnyList also sports a smart recipe system that culls ingredient lists from huge recipe depositories (think Allrecipes, Epicurious, and the like) to blogs "
Does it show you recipes based on something you scan though? That wasn't clear...