My take on the point: manipulation of people. EIE take the crown of that behavoir, at least they are most capable and skillful at it. I don't claim that a lot of EIE do actually manipulate people.
IEE have ego, they are usually more interested in showing their personal values openly, which is often a little handicap at trying to manipulate other people.
Manipulating other people involves a tactical element. Some better conscious control of is vital for that.