(This is essientially the first and maybe the second point reiterated.)
Suppose you were a cook with your own restaurant. How do you figure out what works and what doesn't?
Do you go and do market research, have questionaries, focus groups, do statistics, user-driven cooking or whatever?
Surely not. You create dishes, put the new ones in the menu as today's special. Then you figure out whether people like them or not.
How do you figure that out? Do you ask them? Of course you don't because you know that if you ask "did you enjoy your dinner?" People will just be polite and tell you "yes - it was excellent - thank you very much". No. You look at whether they finished their plates or send it back half-full. Whether you get any sales. Whether they come back for more.
Even my mother knows this. When she cooks cookies, she doesn't ask me "do you like them?" Because she knows I will just say "yes - they are the best cookies in the world, mum". She asks me if I want another. And if I stay the night, she looks at whether I get up at 3 am to roam the kitchen for more of them cookies.
This is basic human behaviour but somehow lost in the academics of business administration.
The second thing is that I get the feeling that the author simply haven't explored the huge "product space" between takeaway and ready-to-cook prepackaged ingredients with a recipe at all. How about - this is essientially takeway but you have to heat the curry in your microwave and then add the fresh coriander yourself - the upshot is that it will last a week in your fridge should you not eat it all tonight. Or maybe: It is protein shakes and vitamin pills for a week - no problem - it stays "fresh" for 5 years. Or: It is the latest Jamie Oliver book with ingredients to get you started on the first three dishes.