I find it hard to even think that people are so lacking in cooking skills that they cannot boil an egg. My Mom, who taught me well, would always say that if you can read, you can cook. My sis-in-law is living proof of that, since she learned to sew at her Mom's knee, but never expressed a real interest in learning to cook. Still, she has become a very proficient cook and baker. These days, with internet access for most and libraries a common thing, I would think that anyone who was the least interested would find the time and desire to learn to cook. Which brings us to...are some people so disinterested in cooking for themselves that they are perfectly happy with take-away?
As far as the list? I found it oddly specific. Like Cin mentioned
....Now, I do know people that can't cook.
1. They couldn't do a simple meat.
2. Vegetables are beyond them.
3. Seasoning eludes them. Heck, they probably don't own any.
4. If it doesn't come from a can or box, they are lost.
5. They think measurements are only for baking.
^Those are basics.^ (Except for #5. It applies to baking, since that is science. Not always to cooking, since cooking is art.) Not falafel (I tried it prepared by someone else, did not care for the texture/flavor, and chose not to bother making at home), not ice cream (quality store bought suffices -
the high-end brand we buy makes theirs by the French Pot method in 2 1/2 gallon batches, even for retail purposes), and if you can make a proper bechamel you can make a proper cheese sauce, so redundancy.
Both of our kids learned to cook when young. He was very interested even before he could see the top of the counter. I called him "Chef Kiss and Tell" because Chef Tell was popular in the U.S. at the time. He cooks from many different cultures, makes his own Kimchee...he's levels above me in some cuisines. She learned under duress, but can now cook just fine. In fact, when we stay with her on our trips back home to OH, I'm pleasantly surprised at the new and interesting basics she's added to her larder from our last visit.
As far as things like flour - basic. Vinegar? Sure you need it in Britain for fish and chips, but Malt vinegar doesn't play well with some other foods. That's why I have close to ten? vinegars in my pantry...