No, I was addressing that point, this study (Lazaridis et al. 2017) determines this:
Modern Greeks resemble the Mycenaeans, but with some additional dilution of the Early Neolithic ancestry. Our results support the idea of continuity but not isolation in the history of populations of the Aegean, before and after the time of its earliest civilizations.
We know from other places in the world, that just because these invasions and population movements happen, it doesn't mean there is a significant change to the population. For example, the Lombards did not leave much of a genetic impact on Northern Italy.