No argument at all. Success does not depend on the amount of talent but the amount of hard work and determination. Totally agreed.
Reply to 2nd paragraph above:
I see it slightly differently. 'Toughness' is the result of 'effort'. I believe a Coach can successfully implement a CULTURE of 'Toughness' wherein seemingly ordinary players can raise the level of their game by a change in attitude, commitment, dedication and desire.