but ... the cost of all those ingredients will still be significantly less than what you pay any meal delivery service, is it not?
for a $1, you can get a bottle of Hoisin sauce.
I find it infinitely more resourceful to have a well-stocked kitchen with ingredients that last a good while than to go out and buy a single serving of anything. I would never consider buying a specific spice or sauce "an investment" in a single type of dish given both the small cost and the viability of those items in other types of cooking. Hoisin is great when making hamburgers or chilis, for example.
And while that doesn't sound like much, again, when we're talking about buying a completely new set of sauces to make one dish, it's $3-4 multiplied by the 5 new sauces and condiments to be closer to $15-$20.
And yes, if I use those ingredients regularly, then they quickly pay for themselves, as the Hoisin sauce lasts like 20 meals and the price per serving becomes fifteen cents a meal. But at the outset, if I decide I want to try Orange Chicken and it costs $20 + the cost of meat just to get the ingredient set, it's alot cheaper just to pay $11 and order some from a Chinese restaurant, no? If I like it, great, I can make it again. But if not, I've spent more money than I needed to and am left with five bottles of sauces I'll never use again.
Case in point: I've got a recipe next week that calls for "dark soy sauce". I have no clue WTF that is or if it is sufficiently different in taste or texture that I can't just substitute my regular soy sauce in for the recipe.