As a PPL and also a radio control model flyer, I have seen at first hand on the model aircraft how little impact is needed to damage a wing. (I had a wing fold part way round a loop, following an earlier heavy landing, with no visible damage).
I'm sure someone more erudite will correct me, but I understand that lifting an aircraft by its wings for maintenance has to be carried out at specific points, designed for the purpose. Lifting at the wing tip, especially 'suddenly', is surely likely to cause damage, as the load is not distributed. No doubt the design of the wing will determine if it's still flyable or not.
RF.