It is not a ranking system
The more useful question is rarely what type am I. It is usually how I use energy, how I process what happens, and how I make decisions when other people are involved.
Four letters do not flatten a whole person
Two people with the same type can still feel very different because history, pressure, and environment change how their natural tendencies show up in real life.
It becomes practical when it helps you communicate
Type language starts becoming useful when it helps you talk about work style, communication pace, and the exact places where friction keeps showing up.