That little tornadic action is a clue to the tremendous amount of energy sucking air molecules off the top of the wing, and in turn the relatively much higher pressure from under the wing racing to fill that low pressure vacuum and creating lift, ...
Maybe the wrong place to discuss this specific detail, or perhaps I'm plainly wrong altogether. But in my (old fashioned?) understanding the higher pressure air from under the wing streaming around the tip to the top is exactly not what is creating lift, rather the exact opposite.
You do want to keep that pressure difference to experience lift. Hence all the effort with winglets and what not, on subsonic aircraft.
That vortex, by trying to balance that pressure difference is reducing lift and inducing additional drag.
Also, while the airstream tries to balance that pressure diffetential along all paths - and I'm not really firm as regards airfoil properties in relation to vortex creation - I was so far always under the impression that vortecies are created by airflow around the tip, and not primarily the trailing edge.