I'm not disputing the fact that Sami are indigenous to the place they live (most humans are), I'm disputing this weird definition of indigenous which seems to align more to the noble savage concept than the actual meaning of indigenous.

Secondly, if you want to segment the world into mutually exclusive "indigenous" areas (I find this kind of offensive to be honest), you should make sure you're actually right. Germanic peoples were present in all of Scandinavia before the Sami migrated there, not just the south. But like I said, I have no problem saying the Sami are indigenous to Northern Scandinavia because being indigenous to an area is not an exclusionary label.