Earlier quoted context omitted.
Those are silly examples and clearly not what anyone meant in terms of components.
Also there is a kind of redundancy in the wings say by making the internal structure much stronger than generally needed. You can have a fracture in one part without the wings falling off.
There is also much more wing than is strictly needed to keep the plane aloft and stable. They're optimized for low fuel consumption at a design-specified cruising altitude and speed, with variable geometry, so they can still take off and land at lower speeds near ground level.
From a certain perspective, the flaps give the plane redundant wings. One pair for low and slow, and another pair for high and fast.