Everyone’s a doctor. I make decisions that affect my health, therefore I am a doctor. I have no special training as a medical professional, but following this logic I can call myself a doctor.
The guy who in purchasing who buys the bolts for the nosecone is now a rocket scientist.
My kid cracked some eggs for pancakes the other day, ergo she’s a chef.
And any other example.
Sure, people in all parts of an organization make decisions that affect other people’s roles and realities, but that doesn’t make them interchangeable. At some point the specific skillset and experience become the differentiator between what I as a designer, and what my colleague the copywriter do. You could say he “designs” copy. You could say anyone who creates a process or system is a designer. But just because I draw a picture of a bridge doesn’t make me a structural engineer. And I’m guessing a structural engineer would agree.
And no, I’m not really a doctor, I just play one on TV.