I suspect that in many cases, it's a generational thing. My parents very much followed the traditional split of responsibilities--he brought home the bacon, and she ran the household. He never cooked, and could barely follow a recipe. A lot changed after he retired :)
My husband grew up like this. His sisters learned to cook and he didn't because he's a boy. However he moved out of home at 18 and now we have 2 kids to feed in addition to ourselves. We both work full time but his hours are more flexible so he often does the shopping and cooking. It's not rocket science. If he doesn't know how to cook something he Google recipes.
I can see this. My parents had a similar division of labor. When they divorced, my dad started cooking, and he was quite good at it.
I never learned to cook. I helped out every summer with canning (pickles, corn, jam, green beans), but never cooking. I think maybe because I had so many older sisters. Basically, I ended up doing dishes/ setting the table. So did my younger brother.
I could make a sandwich or bowl of cereal. In college, I learned to make mac and cheese, canned soup, and ramen.
In the Navy, I would occasionally try to cook things. They were okay. I usually cut or burned myself though.
At 31.5, when I was fat on my husband's cooking, I learned to cook to lose weight. Now I'm a great cook, if I do say so myself.
I'm struggling with the kids though. They both went through the phase at about 4-6 where they were excited to "help". Now the big kid is 12, shows no interest. We got him to help a bit 2 summers ago, but he's really really resistant. And honestly, we don't have the patience to teach him. He doesn't listen (too busy talking about other things), and we are busy and just want to get food on the table. We don't eat cereal and he doesn't like sandwiches.
Today is a bit of a test. No school this week. He's home alone. Husband asked if one of us was going to drive home to feed him. Nope. I left instructions on how he can microwave the last slice of pizza. There'a bit of salad left too. He just got braces, so the raw apples and carrots are out. We do have bananas.
Tomorrow is an even bigger test. Because no more pizza. I do not trust him to use the oven on his own. I think tonight or tomorrow we will make him make his own lunch. Otherwise, I know he'll just eat the breakfast bars. He did that before... but then they are all gone.
Christmas will be another 2 weeks of many days on his own. We can do it! Time to rip off the bandaid!