Of course it could be that we are all full of shit.
In the 70s, both Greece and Turkey were the biggest recipients of US aid and received free Destroyers under the FRAM 1, FRAM 2 and FRAM 3 programs. It would be stupid if the US turned around and sunk the US sponsored Greek Fleet. But that doesn't stop the Kafeneio talk.
Furthermore, A Greek Naval Vessel did dock at Paphos and unloaded some Hellenic Special Forces Troops which headed for the front lines. The Turks were looking for it and in the confusion sunk their own Kocatepe and disabled another 2 Turkish Destroyers.
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Also, Greece rejoined NATO in 1980. If the US is 100% responsible, then you got to wonder why the would want to be a part of the organization.
I honestly believe that we sometimes overstate things to our own detriment.