I don't know if it is due to type or an inability to introspect. I am thinking the latter since I believe anyone can learn to introspect. To some it just comes naturally.
Even SLEs can come to introspection, usually forced to by life's hardships. If they're lucky, there's an IEI around when it happens...
“I have never tried that before, so I think I should definitely be able to do that.” --- Pippi Longstocking