Seeing the damage to the wingtip, slats, flaps and aileron, they could have very easily lost control control.
The following video is in Spanish, but has a some very clear pictures of the damage, especially that of the aileron.
The pilot (the one with brown jacket) has 25,000 hours. He said that he had had the runway in sight since long before the touchdown, but due to the low level mist and the angle of the sun, lost sight at the last moment.
I say bullshit. The plane touched down in a bank, well off the runway centerline, and well off the runway heading. It looks to me that the pilot touched down while still making corrections to line-up with the runway. An in any event, they were in a visual approach. If he lost sight of the runway he had to go-around.
He also mentioned that they never realized of the damage because the plane kept behaving normally. If that's true, then it was an immense luck (it already was the the aileron didn't lock or that a flap or slat panel wasn't lost).