Help me understand the following. With WBC the question is mainly being stated as can one try to break WBC to identify the key. My question is: *Why would one ever want to do that anyways?*

If one can locate the WBC itself it should be enough to enc/dec anything she wants with the embedded key. To me it comes to chicken and egg problem where now one would need to "hide" WBC itself within the code to make it any practical.