Problem with the denial is, as (almost all, including LH group as a whole) airlines tend to deny EU261 requests extremely often in the first attempt with "vague reasoning", the very few times where actually a proper reason exists to not having to hand out compensation (Assuming that everyone here knows that they can't claim when it has been something obviously not in the hand of the airline, ie weather/strike actions, and won't try to claim if such thing happens) can easily be overlooked.
Maybe LH group should have another "Textbaustein" they use in case it was REALLY something being a valid exclusion reason, so the experienced traveller (vs. the not-so-experienced, who will still be giving up receiving the regular "we don't need to pay because we don't need to" reason) at least understands that in this very case, it might indeed not be possible to get the compensation funds
