It seems like you force the condition that violates spacial isotrtopy, by "pushing" a single preferred spacial vantage point
This, by asserting that time synchrony must be determined (why, we talk from the view point of an observer that is yet in a third point, not in the vehicle, nor in Beer sheba)
And by purporting to insert the point of accelaration into the question , by "necessitating " history.
Thus, you force the parameters of the question at hand to fit your view, by artificially enforcing a very special case