"By some estimates, only one out of every 10 cells in the body is human." We're not people, we're just billions of cells, all traveling in the same direction.
Dude... wait, what? I didn't get that from the article at all. All it said was that scientists were finding new species of cells on the skin, not anything about the quantities or proportions these cells form.
I'm pretty sure well over 99% of the cells in any person are not only human, but have the exact same set of human genes, otherwise DNA testing would be pointless.