The thing about Disney & Ireland is they are "open" 365 days a year while school is only in session 180. It doesn't take a math whizz to note that you can do such a vacation AND still attend every day of school (again, assuming you aren't one of the small minority stuck in a job that doesn't permit you to take off when kids are off).
I have a bit more understanding for those who vacation in places that cannot be done during the break. If we want to see a new President sworn in, go to the World Series, or attend a family wedding, there's no flexibility there. Disney though? That one's a bit harder to justify