If you do testing, and recognize how cognitively rich the activities involved in testing are, you probably also recognize the importance of testing skills.
On all the projects I’ve contributed to, good testing, deep testing, involved skills. Asking a random person from the street to test on the project would probably not have led to spectacular results (unless, of course, they happen to be an exquisite tester with awesome testing skills!). Developing those skills requires a lot of work.