Another counter-argument is the fact that ancient Anatolia is known to have been inhabited by non-Indo-European people, namely the Hattians, Khalib/Karub, and Khaldi/Kardi; though this does not preclude the possibility that the earliest Indo-European speakers may have been there too.
The Tibareni and other related tribes, the Chalybes (Khalib/Khaldi) and the Mossynoeci (Mossynoikoi in Greek), were sometimes considered the founders of metallurgy.