Most people act on instinct and don't think on things.
Here's a horrible truth for you to swallow: If you are hyper analytical / high inhibition, chances are it's a result of you being socially isolated and you being ugly causing said social isolation.
When you have no one to interract with and no one to do stuff with, you get trapped in your thoughts and think. Think. Think. Think. This in turn forces neuronic activity at a level that the ordinary person doesn't act on.
There was an old saying at a local prep high school: "We don't smoke, we don't drink, all we do is think think think."
Further, I'm convinced that video games are also related to said neuronic activity, simply because in a video game, you have to analyze certain scenarios and your brain has to make quick decisions on these scenarios.
When you, on a day to day basis, analyze and think things through, you inevitably analyze every decision you make.
Most people (I would say 70% of people) aren't socially isolated and need ro perform high neuronic activity. They've acted on instinct and listened to people before with good results, friendly comradery, a decent job, a house and kids. They just "do" and follow on the flow of life without thinking of the consequences of their actions.