It’s a good idea. They should also create a dinner in 30 minutes aisle. Full of good ideas and recipes. Folks might stop at the grocery store instead of McD’s.
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I can walk in my local Publix, grab a packaged selection of deli sandwiches or sushi and I am out in 10 minutes for never more than 6 bucks.
A bag of chips and a six-pack of beer = a seven course meal.
In the mens aisle all canned foods will have cooking instructions to use a 50 MegaWatt microwave for 3 miliSeconds
The bottom line is the grocery store, particularly for individuals but even for couples, is not a better deal than a place like McDonald's.
They are designed around overeating families' demands. Couples or individuals will face considerable waste or seemingly unending duplicative meals.