ILS 119.5: I can understand your point that it appears to be worrying.
However, although this isn't ENTIRELY the same, having come from a military background, I found that although people love the job very much, the leave and holiday prospects are often what keep people going (or at least give them something to look forward to that isn't work related). I have been brought up to know it isn't wrong to look forward to breaks, it's just wrong to let the thought of holidays stopping you doing your job properly! And also brought up to be flexible. Also, on the whole, my father (who was a military instructor) usually found that the holiday questions asked by students/trainees/whatever were not actually fully for their own benefit or excitement, but rather for the friends and families back home, who out of no fault of their own, are out of the loop and are eager to "make plans" with a son or daughter who is in a career where it is not that easy to do so.
I do hope I have made sense!