The problem with it is that it was created by someone who has one personality type, and it's therefore not an objective view of the 16 personality types.
Let's pretend the person who created the MBTI is an INTJ and their name is Carl Jung. Carl is viewing the "16 types" through his clouded INTJ view of them.
So if you were to say you are an ENTP based on a Jung-created MBTI test, you are just an "ENTP" in the eyes of an INTJ.
IDK, food for thought. I don't think you can objectively fit into a personality types unless a personality-less being came down from the Heavens and made an objective personality test we could all take.