Well that is what the article clearly implies, at least in my view. If the tools discovered in Crete are attributed to those species, then it makes sense that those species traveled - by sea - to Crete. I respect that you do not see it in the same way, but I do not think my interpretation is by any means irrational.
You are right, sea level was lower than today. However, if you visit Floodmap and lower sea level by ~130 meters you will see that this difference practically does not change the distance between Crete and Peloponnese (Peloponnese being the closest mainland to Crete). Aegean is a deep sea...
The truth is that I do not get your point. I am not claiming that those people had extraordinary technology, like metals. So, I do not see why seafaring and primitive tools are conflicting. And that is the impressive part for me: while they did not have any sort of technology and they were mentally less advanced than Homo Sapiens, they could travel big distances in the sea. The fact that they did not have advanced tools does not make them stupid. After all, even Homo Sapiens did not have advanced tools until a few thousand years ago.Quote
Also to consider is that while the idea of "seafaring" conjures an implied level of sophistication and cognitive ability this is directly betrayed by the primitive nature of the very tools not only found there but available to whatever species one desires to point to at the time.
Those people being Neanderthals or Homo erectus or anything else for that matter, does not affect my point. And in my book my point is clearly that less advanced humanoids were able to travel the seas.
Thank you for giving me the chance to clarify things.