Sometimes you're just lucky.
Jean-Pierre Lehmann provides some deflation, of the good kind. (Link)
Of course a country needs some basic strengths to capitalize on the opportunities that being in the right place at the right time tosses in its direction.
And of course, leaders of a country have to keep the "feel good" quotient high so as to attract voter and manipulate insecurities.
However, leaders should never get so high on the mythology to believe that hard work and sacrifice were even close to being all that was needed.