I'd be extremely surprised to see $12 eggs anywhere, at least not as the cheapest option. To be honest, it sounds like you don't actually buy groceries very much if you think that. As of last week at my local supermarket, eggs are $2.50-$5.00 for a dozen, depending if you opt for the organic options or not.
But yeah, this just reads as a flimsy justification for bad habits. Cooking is quite simply cheaper and always has been. It is not difficult to make filling meals for $1-3 a person (staples like rice and beans are especially cost effective), which is far, far cheaper than ordering takeout from anywhere.
Groceries absolutely have gotten more expensive and it is a problem, but there's no world in which that problem is improved by ordering Doordash or the like all the time.
My brother works for a company acquired by Bain. They are every bit the vulture capitalists bleeding companies into lifeless husks.