By Hellenic, do you mean Platonic specifically? Besides the fact that I dont think you accurately represent Plato here, there is a lot more to consider there than just him. The idea of the Tragic for example, which Nietzsche considered the most important discovery of the Greeks, certainly does not identify man to be the cause of his own fate.
“Tragedy, in its highest form, is the revelation of the world’s tragic aspect… Through the Dionysian, we experience the unity of all things, the true essence of existence, not as the separate existence of individual things, but as a primal unity.”
(Nietzsche, The Birth of Tragedy)
The tragic, it could be suggested, disproportionally concerns people of great infuence who contend with great forces and come in collision with ‘the world as it is’; it is not a coincidence that the great tragic naratives often concern kings and nobility, and rarely folk of modest powers. These are free to live in their individual bubble, as their modest power and accompanying pride offends no one, causes envy in no one, has no opposition.
Plato focusses heavily on freedom from desire and rational choices. But what is a rational choice? And was Socrates free from desire? And was he not, besides causing a lot of things, also a tragic figure in the end, was not his final fate a definite being-caused? Hellenic philosophy, even just Plato, holds much more complex views on mans causality than what you seem to suggest.
“The soul of each man is immortal, and the misfortunes that happen to him are part of the course of nature… And the world, in its process of becoming, is composed of what is best and what is worst.”
(Plato, Timaeus)
Your outlined position seems mostly related to the industrial rationalists, from Kant to Ayn Rand… the idea that reason and self are the the worlds guiding principles, of individuasl agency; This goes directly against much of what the Greeks thought, and isnt seen played out by history’s leading wills. Consider Alexander, Caesar and Napoleon.
Nap:
“Great men are not born for greatness, they become great through the necessity of their times. But greatness is fleeting. It may pass with a single step, a single moment of forgetfulness.”
For all these reasons:
“When it was Odysseus’ turn to choose, he looked at the lives of those who had chosen before him and saw that many of them had chosen great or heroic lives. But Odysseus, after looking at all the possibilities, decided to choose a life of obscurity and simplicity — the life of a private man, far removed from the grandeur and chaos of fame.”
(Plato, The Republic)
“Heavy is the head that wears the crown.”
(Shakespeare, Henry IV)