[Boeing Guy]

of course, if the wing did not flex it would be brittle.
When they build aircraft, Boeing etc have to bend a wing until they break. Typically Boeings go to Twice the design limit before snapping, even then you would still have some aerodynamic lift, so it would be the end of the world.

The secret of the Theroy of flight really revolves around the 'lift fairys' and the fresh buttered toast syndrome, all jet aircraft have a endless supply of fresh buttered toast stuck under the wing butter side up, because as we all know buttered toast always lands butter side own!
I thing Airbus use cats? But not flown one