Being able to point out the right things that need to be fixed is an important skill. Most people can tell when something is off about a product but can't tell you exactly what it is.

You can easily identify the wrong thing as the problem then end up trying to hide a symptom instead of fixing the problem. Medicine is notorious for treating symptoms when the underlying problem is usually related to something else like diet or (lack of) exercise.

You can also completely fail to identify an obvious problem such as the games where you end up stuck and having to Google how to progress because the game is poorly designed. This poor design isn't going to be obvious to anybody working on the game every day because they designed and already know the solution but it would come up if somebody else played the game and got stuck.