Does the 'Why' Really Matter?

Do you find yourself asking the question 'why?' when things don't turn out the way you think they should?  Perhaps you question why someone has made a certain decision.  Or why they've taken a particular action.  Why they ignored your input.  Why they didn't take certain facts into consideration.  Or perhaps you question yourself.  Why did you do a certain thing?  Why didn't you listen to your intuition?  Why didn't you know better?  All common questions.  Yet, I'd like to challenge you with the thought that the 'why' not only doesn't matter, it leads you onto the wheel of fear...