Are you familiar with what WK’s teaching method is? The kanji parts are given names so that stories can be created as a way to remember how they fit together.
Since the system relies on these stories, which are unique to this site, they take you from step one of the process no matter how much you know. Because if you suddenly jumped to, say level 10, the stories would consist of tons of kanji parts you had never learned in the first 10 levels.
If you desire a more free-form kanji learning resource, there are many available to choose from.