AI or not, ordering any food delivered takes time to deal with and collect. When your food is already there, you can pick the exact second you want to eat lunch and not wait 30 or 45 minutes for someone else's delivery time frame to match yours.
Beyond time, I will go out of my way to make larger portions for leftovers because I know what's in the food I make, and I try to make healthy food. Even "healthy" options from places that deliver aren't always that healthy. There's an element of knowledge about what I eat that is equal to cost savings in my mind.