Hi tengberg...
I know you're looking for a more psycho-analytical approach to interpreting your dream in the sense of why people read in dreams. Like you, i dont know all the reasons, they are often personal too. But if you remember what you've read in the dream the message itself may be one of the relevant considerations. The nature of the message itself might help you determine the value and origin of the message.
It seems the words in your dream ['Words and Sounds are Meaningless'] are trying to tell you something about the 'worthlessness' of words [ and sounds ]. I'm just a tiny bit struck by the irony of it. Funny how it took 'words' to try to get you to understand something eh? Might words therefore be useful?
Could be that the statement itself is meaningless. How would you know? Perhaps because whatever state of conciousness projected that little 'gem' into your dream awareness has used w-o-r-d-s. That means 'it' must find words valuable, meaningfull, useful to communicate concepts...
More than that, words and sounds have great power and are used to key you in to higher [ or lower ] states of conciousness [ depending on which words and sounds are used ]... [on that subject i'm going to post another thread on the 'Science of Sound' dealing especially with the subject of pop and rock music concerning it's dangers to the spiritual aspirant... I wonder how well that'll go down on this forum? Folks have all got their favourites haven't they.]
If the origin of your dream projection has used words and images [ which are sound anyway ] and they are meaningfull enough for 'it' to use, then words and sounds are meaningful for you too. In relation to the message itself, don't believe it.
Again tengberg, you were probably looking for something describing why people read in dreams. I would say a major reason is so that we can be informed by the message itself. Informed "of what" is a bigger question. What is the message trying to tell us.? And that question raises the question of the origin of the message. Has it come from the higher self?... or from 'beneath'? [ not to mention that intoxicants and bad diet can 'garble' our dreams ]