[UnFleshedOne]

That's the problem -- you are preparing 2-3 meals a day instead of two big pots once a week and simply reheating them for your meals. At this point time and effort investment starts being significant (you get to eat different freshly cooked food each day so it might be worth it, if that's your preference).

For example it took me 1-2h (including cleanup, but not counting shopping) to prepare 7 liter pot of stew from random veggies and some meat. It will last us whole week in lunches to take to work. Another day we'll make a pot of soup (our old one wasn't done yet) and that would be all dinners for a week. Takes 3 minutes to reheat each day, no delivery can beat that, unless you live above fast food place or something.