I had a lot of 'unauthorised absence' from school in my teens. I can see now that I might have been better off turning up occasionally, but I hated the place. (Part of the reason I hated it is linked to the fact that they mostly didn't even notice when I wasn't there.)
With our son, we always supported the school and definitely encouraged attendance - never mind convincing the school he was poorly, he had to convince me and his mum first. We had a few differences of opinion with the school over the years but ultimately none of it really matters - he passed his exams and is off to university next year. Whatever it says on his attendance/discipline record is no longer of any consequence, except perhaps to the LEA, but that's their concern, not ours or his.
My sister has a different attitude and is constantly railing on facebook against the injustice of not being able to afford to take her kids to Disneyland in term time. She also rails against the council introducing parking charges on Poole seafront. She's one of the most entitled people I know. God knows where she got it from cos it certainly wasn't our parents.