With the finding out the naruti and sasuke are reincarnations people think that the theme of hard work has been thriwn away and so has destiny but i disagee ashura may have transmigrated his chakra into naruto but the sage said something along the lines of he knows why ashura chose him this is because of who naruto is on the inside aside from what he has inherited. Also the prophecy that naruto will save the world is not throwing away the concept that destiny us not decided because naruto could infact fail as the ones ashura has chosen before naruto has...it is who naruto is that makes him able to save the world something the past reincarnations did not possess is naruto being stupid and what not which the sage pointed out..so i believe the concept of hardwork is not gone because if naruto chose to give up ashura would not had chose him