Slight correction based on my experience and because even without a PhD, people regularly put in the time to become subject matter experts:
Someone with a PhD isn't inherently more intelligent than other humans. They are able to put up with the institution abuse and bullshit required to be given a title that designates them as a subject matter expert in a field.
Slight correction based on my experience and because even without a PhD, people regularly put in the time to become subject matter experts:
No shade to PhDs, I feel your pain.