People are coherent in my experience but parochial is a fair descriptor. Many can talk your ear off about the shiny object they bought, the minutia of the statistics of their team's star player, or the resort they recently visited while having little to no awareness of broader concepts. Some are completely aloof to concepts that don't involve them.

Whether they're good people.. That depends on how you set the standard. I believe that a fairly self absorbed person can still be a good person but there are many who would disagree with that.