Some meals are generally not regarded as cooking, putting cereal and milk in a bowl, making toast, slapping a few ingredients on a sandwich, those will always be cheaper and easier to just do yourself. Apart from that there are many meals you can easily make yourself and have last for 2-3 meals or amortize the time over the number of people eating it.

Tonight I'll be making spaghetti bolognese for under $10AU and it will last a huge dinner and two lunches, it takes under 10 minutes to shop for and half an hour to make, the majority of which will be spent on entertainment while I stir the pots every couple of minutes, the "damn good at packaging" is putting it in microwavable containers. If I was having this delivered I'd by looking at $20AU+ for a single meal, if it was eat-in I'd blow which of the time saving travelling and waiting to be served anyway. Other meals can be even less effort, like when you've got a rice cooker doing the heavy lifting.

Outsourcing food production saves little time, costs a lot more and will often deliver worse results, especially if you factor dietary factors into "worse results".