We plan a lot in Scrum: There is a daily plan when the Developers think about progressing toward the Sprint Goal during the Daily Scrum. Of course, the Sprint Goal reflects an intermediate target the Scrum team considers valuable to solve their customers’ problems. Moreover, there is the Product Goal, a mid- or long-term objective of the Scrum team. 

The problem is that when Scrum teams already struggle with embracing the concept of the Sprint Goal—first, you agree on the objective of the Sprint, then you pick the work you consider necessary to accomplish it—they most likely also struggle with proper Product Goals.