We don't value things which we get for free.
Do we?
Take the above statement the way you like.
Take it as a wild imagination.
or take it as a 'philosophical' utterance
or take it as an 'utter nonsense'.
Take it whichever way you like it, but you can't deny that there is a shred of truth in the statement.
Things which we get for free, we take them for granted and hardly ever take them the way we ought to.