Your dreams and imagination evolved as a view into another universe. As with the current beliefs, you cannot decipher technical information -- no words in books, no details of how devices work, so even if you can describe things you see from another place, you could not reproduce a working version.
Now how do you convince others that the things your are seeing are really happening without being labeled insane? And how could you use this information to benefit yourself or others? Take a peek into the multiverse to see how other versions of yourself have solved these problems...
I would try to communicate the feel of things - either "this doesn't feel right" or "oh shit, I think this is what we should do!" but idk how to do it better because the information from dreams is always so misty - what's a silly amalgamation of experiences you've had, and what's an actual analysis of things that might happen?
I genuinely don't know about this, because this is a problem I have in my real waking life: patterns and weirdness adding up to problems that cause me an itch that I usually can't express until it's an issue for everyone else, too, and then it's usually too late.
I think this is the best use of psychedelics - they help you see solutions that are outside your usual, obvious worldview.
I've had some experience with mushrooms and it really does change the way you perceive yourself and the world around you. I am definitely a better person for it.