@FireMadeFlesh Dreams may not have predictive power, but they might be a window onto our emotional state, if we learn to interpret them effectively. Conscious thoughts can be quite misleading in their own right. We are not always aware of everything that is going on inside our thoughts and emotions, and some of us are less perspicacious than others. We are easily mislead by our own minds. Thus, I do not privilege conscious thoughts over dreams, insofar as emotions and wishes are concerned.
I do believe your point is well-taken as far as model-building of the way the awake world works. But that is an external reality, subject to science. Subjective reality is not subject to verification, and can only be interpreted subjectively. I don’t think this means we should discount subjective experience entirely. I think different rules apply to it. It has much more uncertainty, and any meaning from that experience depends upon interpretation and observation and communication skills (observation of self, and communication to self as well as others).
Thoughts are subjective, too, and as such, like dreams, share the same difficulty in interpretation. I don’t think it is a good idea to dismiss them as the subject of humor in such a light way. In any case, people do find them significant, just as they find thoughts significant. We each take our own meaning from thoughts and dreams. Perhaps you find dreams insignificant, but there can be no generalizing about subjective experience. You simply cannot gather evidence to support any such generalizations.