alt Hacker NewsI think the myth comes from the upfront costs of cooking equipment and spices as well as expensive proteins like ground beef. If you cook with mostly starches like rice or potatoes and just some meat, there's no contest. The other thing that can make cooking expensive is buying too many different ingredients to make a fancy dish and having a bunch of leftover stuff that gets thrown out. But that's where soups come in.
I think most people don't know how to cook cheap stuff and don't even know where to start. It is a bit of a learned skill. You get a repertoire of cheap but delicious menu items over time. It used to be that our parents would hand them down like sacred family heirlooms on notecards in a greasy metal box. But our parents were way richer than us and they only kept the most delicious ones.
One big hit for me was having to create an entirely new set of recipes when I cut out meat from my diet. It got really hard because plant protein is way different from animal protein. The processed vegetarian stuff is insanely expensive too.