Having said all of this I've been thinking of how this "warning" plays out if interpreted differently. It could be seen as an appeal to the EU to give the UK something , to make concessions and avoid a no-deal exit. It appeals to the short-termism prevalent in politicians on both sides of the channel but (and the but is really important) a shrewd continental politician looking at the 5-10 year economy will probably see that they can make these concessions with little risk.
It runs like this: Dear EU please make concessions to the UK to avoid a no deal Brexit because if you don't then it will cost us billions and billions of euros and result in temporary shut downs of production in a bunch of sectors putting continental voters out of work. Of course in the long run, the friction implicit in Brexit will make the UK uncompetitive anyway so if we can get a fudge for a couple of years then you (the EU 27) will see an advantage and (in the Airbus case) the wing work will gently drift onto the continent in an orderly way.
PS My money is on the wing work ending up in Spain.