That’s normal policy in most state schools and goes by the government guidlines.
Basically they unauthorise it, you still take him/her out of school for the week and it goes down as unauthorised. This means little unless your child has a history of being off a lot then you might get a visit from the EWO. Otherwise it’ll never be a problem.
Nothing to do with ‘we know best’. Although there is reasonable evidence and it’s reasonably obvious that prolonged periods of absence lead to poor exam performance. Also, as the school has to record it as unauthorsied then their % attendance goes down. This does not look good and is another government target that needs to be hit.
Take him to Florida, enjoy it, just don;t go to chuffin’ Disney if you want it to be educational ;0)