Several 747-436 are slated for retirement and parting out
This is one that was due to be retained. Some have been parted out already so there are plenty of spares but perhaps they’ll just swap it for one of the ones due to be retired.
It’s not as though they are desperately short of the type although in the short term it might cause a hiccup whilst they organise cover.
It does seem pointless to repair such damage when they are flying perfectly servicable airframes to their doom that possibly only need an overhaul which has caused their turn to come up.
That would be a quick answer too.
Just my thoughts.