See, the modern use is actually based on popular media portrayals of narcissistic personality disorder
This is the opposite of true. The adjective "narcissistic" has been in common usage since the late 19th century to mean the exact same thing it means today, i.e. "self-centered." The term "Narcissistic Personality Disorder" wasn't coined until 1968.
Truly, you're eager to manufacture outrage for some benign things. What's up with that
One of the greatest arguments ever constructed. Truly.