Dang! That's really rough. I get that schools have to have rules and limits for these kinds of things, and I respect that, but family vacations and travel in general are valuable experiences for a kid. Pulling an elementary -aged kid out for a week for vacation (assuming they don't have attendance problems in general) shouldn't be a problem, and I'd be miffed if it was.
Luckily I know our school is supportive of family vacations (it was one of the first questions asked/answered during kindergarten orientation

and the principal's response was just "absolutely okay, but can I come?"), and we've made a concerted effort to make sure kiddo gets to school every day (she has no absences so far). But I know not all districts make this easy on parents. We're fortunate.