Cooking skills are important. Many, many people struggle cooking good nourishing foods as they just have not learned how to cook different things. A lot of people can do the basics, but do not have sufficient knowledge on some slightly more advanced skills.
Knife skills is another important topic within learning how to cook. It is very good to know which knife is the best to use for which cutting job. There are quite a few knives out there that are excellent when used for their purpose, but can be a pain when used the wrong way.