I encourage that you read the studies you linked, again they are very specific in laying out that the "Iranian-like" ancestry is agriculturalist or "farmer" ancestry. Which you also highlighted in your wikipedia link above. Iranian agriculturalists, are a population that is different from that of the Steppe pastoralists.
Here is Eurogenes discussion (read some comments if you are interested) on the two studies you linked:
http://eurogenes.blogspot.com/2019/03/ancient-island-hopping-in-western.html
Secondly Iranian-agriculturalist is not the same as Steppe-pastoralist and the Iranian-farmer ancestry preceeded the Steppe ancestry in the example you provided in your Wikipedia link.
To quote the paper:
Again, I encourage you read these papers and don't make knee-jerk assumptions based off of haplogroups alone, It is not known for sure yet which language the Minoans spoke, their Linear A alphabet is not yet understood, in contrast with the Mycenaean Greek Linear B.