it could be argued that the wing is mainly sucked into the (sky) lower pressure air above the wing.
Yes but what is "sucking"?
Is sucking a force that pulls or pushes?
Does a vacuum cleaner suck air? Is the air being pulled in to the end of the hose, or is it being pushed?
Air pressure on a surface can only PUSH on that surface, it can not pull!
A complete vacuum is simply a complete absence of air molecules and therefore a complete absence of this pushing force. A vacuum is not an existence of any pulling force.
A reduction in pressure can only mean a reduction in this pushing force, BUT IT IS STILL PUSHING ON THE SURFACE. It can not pull on that surface.
So when you say the pressure above the wing is sucking the wing in to the sky, the forces on the upper surface of the wing is not contributing to the total lift force by pulling the upper surface up, it is simply reducing the force pushing the upper surface down. But the force on the upper wing is still in the downward direction (perpendicular to the surface)! It's just that it is no longer equal to the opposing pressures being exerted on the underside of the wing.
So the way I see it, when a wing is suspended in still air, the air pressure pushing up on the underside of the wing is countered by the air pressure on the upper side pushing down. The forces cancel each other out and the result is zero force (no lift).
When the air is flowing past the wing (with a positive angle of attack) and colliding with hitting it's underside, compressing together slightly and so the pressure exerted by the air molecules on that side of the wing increases slightly.
On the upper side the air molecules are being pulled apart from each other as the the momentum of each molecule does not allow them to keep up with the upper surface of the wing's trailing surface as it slopes downward and away from the air molecules.
As result of this greater distance between molecules, a vacuum is created, ie the downward force on the upper surface of the wing is less than it would be if the wing was stationary. This reduction in downward pressure is not enough to counter the pressure on the underside of the wing. The resultant force is up.
Anyway that is the way I see lift being created by a wing, or a flat plate.
And to answer the question posed above, air is pushed in to the end of a vacuum cleaner hose not pulled!