"Water is wet" isn't the realization in what I'm hypothesizing, but could be a spark of an idea that sets of a chain reaction of tangentially related concepts that seem to make a whole lot of sense as a whole and impart feelings of great beauty to one who is high and might inspire that person to write down the "big bang" of their experience, if you will. So, someone writing "water is wet" is writing the map, not the treasure.
Maybe?
[]I've done mushrooms once and it was mostly a horrifying, traumatic experience. The drive home during sunrise with my car's radio set to the local classical station playing choral music felt particularly affecting, though.
Sounds like its similar to experience of being drunk then. E.g. you get a bunch of unrelated uninteresting ideas, that seem impressive to you, because the part of the brain, that is responsible for filtering bullshit is off/operating poorly.