I used to devour Enid Blyton books (back in the 70's) I read an AWFUL lot of them,including all the Secret Seven , Famous 5, Six, Malory Towers, Faraway Tree and Wishing Chair stories to mention a few.
Somehow, I knew,even then, that the children in the stories were a bit snobby and privileged,but that did not stop me from enjoying them.
My favourite book, which I re-read several times, was Hollow Tree House, about a "poor" girl living with her wicked step-mother,who, with the help of a friend, ran away from home to live in a hollow tree stump in a nearby wood where she had the best home she had ever known.
I used to be full of indignation at the step-mother who refused to sign a permission slip for the girl to go on a school day-trip to the seaside. She had never been to the seaside before, and yet with the help of the friend (and a teacher, I think) she managed to get to go with lots of subterfuge! It was very sad when her hiding place was found and she had to go back to the house where she wasn't loved. It had a happy ending though!
I loved that story so much!!
My own children, partcularly my DD and DS2 both also loved the Faraway Tree and Wishing Chair stories.
I think that children realise that the values are of a different age, so it doesn't make a lot of difference to them. They know things are not like that now.