Workmaster, where do you imagine that Air Lingus can conjure up spare aircraft from? Give the airline a break, they only have 7 A330's and over 25% of that fleet has now been grounded due to no fault of theirs.
I would agree that they are a flag carrier but Ireland is not that large a country (in terms of population) and as a result only has a modest sized national airline. An airline the size of Air Lingus cannot afford to have a couple of spare planes hanging around on the off chance that the odd tornado might sweep across the apron at Dublin.