A pilot with a stalled airfoil would probably not agree that 95% of his lift is still being generated (as he falls from the sky). Airfoils, by their design, are unlike blocks. They use the shape of their upper / leeward side to generate significant lift. When the airflow over that side separates the reduction of lift is dramatic.
Here’s an interesting picture from the Wikipedia page on airfoils:
View attachment 204096
Notice that even when the angle of attack is 0, meaning no downward deflection from the lower side of the wing, lift is being produced.