Your way of asking this seems to limit responses to your own preconceptions.
For myself, outside of psychology/psychiatry I have no idea what you mean by a “teacher”.
Outside of this scientific profession you seem to suggest any self-taught, self-aggrandising quack or fortune teller or new age charlatan with a swagger or patter culpable of fleecing the gullible or the vulnerable.
You put someone’s hand in water while they sleep and they will either wet the bed or dream they are swimming. Sure, dreams are often the working out of subconscious concerns or issues. Often they are just the brain weaving sense out of fleeting thoughts, random firing of synapses, significant events of the day or just the passing sensations of the sleeping body…be that a wet hand, talking in the background, a car misfiring in the street, a buzzing mosquito or a breeze from the window.
Even more easily than reality, glib speakers can make anything out of anything - dreams are more fertile than life in this regard. Who actually knows what they mean. They may not even have any more meaning than the random patterns of clouds in the sky.