Yes and no
Even a guy with natural skills,need refinement and training
There are guys out there,that have skill gifted by god,but have loses on their record for whatever reason
Grant,Bowe,Mosely,Trinidad,all like god built his own boxer in their prime
And they all fell down at some point
Then you have a guy like Hopkins,late start at boxing,slowish hands
But he works harder at it then anyone in the buisness
Even when he loses,you leave not being %100 sure he lost