I’m not this way myself but it’s a fair question and we see this mental detachment in the crazy artist and mad scientist alike. I suggest it’s a combination of two factors: they instinctively see the underlying code in particular things or events which sends their mind off on a tangent, sometimes a very useful one; and they are always slightly in Alpha brain state so have the same vagueness fully rational people have when they’re half asleep. Any more suggestions?