That's a bizarre claim, confidently stated.
Of course I can make a fire, cook and my own food. You can, too. When it comes to hunting, skinning and the cutting of animals, that takes a bit more practice but anyone can manage something even if the result isn't pretty.
If stores ran out of food we would have devastating problems but because of specialization, just because we live in cities now you simply can't go out hunting even if you wanted to. Plus there is probably much more pressing problems to take care of, such as the lack of water and fuel.
If most people actually couldn't cook their own food, should they need, that would be a huge problem. Which makes the comparison with IT apt.