Caporegime
You are right the 1080 is a high end card... according to "The marketing of Nvidia". LOL
Nvidias Graph
I'll Give you that the 1080Ti is a high end card. But the 1080 absolutely is not. It's slap bang in the middle of the Pascal Family. Just because when they released it first they "claimed" it was high end. It isn't. It's cut down. Ergo - mid range.
You quoted an image that said the 1080Ti was "mid-range" you now say it isn't but the 1080 is, so not sure what you are arguing about? The 1080 is pretty much on par with Vega 64, so is that a mid range card?