The idea that there is such a huge difference between nerds and people who aren't nerds is misconceived.
Not only are people who aren't nerds capable of being analytical, but nerds themselves are highly able to be irrational and stupid.
Case in point I've seen nerds who are so stupid they think of themselves as autistic savants who can't "understand" normal humans and must "model" them in order to interact.
No nerds are just people typically on the lowest rung of the social ladder with interests in specific technical topics like anime, chess, etc. They are not more analytical then the rest of the population.
You've been told what you've been told because it's true. There are tons of people like you and it's not people who are analytical.
It's people who like to think of themselves as more analytical then the rest of the population. You think some topic your switching to in a conversation could only have been discovered by your powerful analytical mind but it breaks the flow of conversation and is literally not as intelligent as you think it is.
You are not intelligent enough to comprehend the purpose of conversation. Conversation is a two way street it is not a platform for you to show off your intelligence. Think of it like this, when you go off on your intelligent tangent, does the other party understand but remain uninterested? If they understand what your saying then that means they have the analytical ability to keep up with you. It's just they find it not interesting enough to continue. So the problem isn't your analytical mind. It's your lack of analytical ability to comprehend the situation at hand.
Additionally I doubt you actually are that much more intelligent. Do you have genuine IQ scores to back up your claim? Even people at 150 can be quite normal. The things you describe typically happen at much higher IQ scores, so people who think of themselves this way, by probability are more likely to be deluding themselves rather then actually being that much more intelligent.