I don't think it is a "idk how to cook" more than "i don't need to cook" problem. You don't need to know how to cook to survive when food delivery services is just one click away and if that is not your thing you can always takeaway or dine-in at the restaurant/shops instead.

I can cook, i enjoy cooking, i prefer cooking but sometimes i am lazy so i do takeout or dine-out instead. Most of the people i know don't know how to cook (by that i mean anything more than reheating precooked food, frozen food etc) if anything i am in the minority.