No they say "Your choice to move away from your family or their choice to move away from you shouldn’t adversely affect all of the other children in your child’s class because the teacher has limited time and is now spending it catching up your child who missed foundational concepts for the stuff that is being taught when they get back.

You are not entitled to cheap travel. I never got to travel all over the world as a child because, spoiler, we couldn’t afford it, but people also didn’t feel so entitled to cheap travel that they were taking their kids out of school for cheaper flights. You just didn’t fly.