It's not about being able to afford expensive resorts - many wonderful opportunities are simply not available during school holidays.
I am a responsible parent that supports and enables her child's learning and am capable of deciding what experiences are educational enough and/or worth enough to the family to outweigh a few days off school. I don't take decisions like that lightly, I wouldn't take more than a week a year, I wouldn't do it when it could affect exams and I would always factor in time to complete whatever work they would otherwise be doing that week. As such, it should be my decision, in discussion and conjunction with the school, to take my children away.
The problem is that we talk about "education" like it only happens in a classroom; like it only comprises learning about letters and numbers; like it stops when you're eighteen. Education is also about emotional intelligence, and how to behave like an adult should; it's about personal, social, and environmental responsibility; it's about different food, different landscapes, different cultures and how to be sensitive to them. It's about how to move in the world. I want to show my kids these things; to educate them to be open to the world it and careful in it.
Dammit, if I had kids just to outsource all that shit we may as well be giving them up at birth to educate them in government hives. We get a few, precious years here, before they hit late teens and fuck off to Shagaluf. I will make the most of those years.
There is no reason at all why we can't use sense and flexibility to facilitate families with this kind of balance.