We try to label ourselves based on the position we take.
I lead many Agile initiatives and I am part of many Agile conferences and communities and I see this over and over again.
What is in a book is rarely what is happening in a company. You might label yourself as a project manager, but you also do product owner duties and so on.
The challenge for many employees is to either educate the management and change the status quo or to be assimilated into the company culture.
Chose your fights wisely, because you might win the battle, but lose the war.