Thats not really the whole of the argument here. You could literally dump the cash int he nurses lap and it would be more of a thank you to them than some plans flying over head.
That it is a shitty way to say thank you and not one that any one they were thanking either appreciated or wanted. From what I hear most of them would have rather them done nothing than to create a shit ton of pollution and waste a bunch of money for no reason.
The idea that the money is pre-budgeted and couldnt be redirected is part of the problem I suppose, not so much a justification.
with that said there were probably much better gestures than that.