Then perhaps Ms. Johnson should take that up with 90% of the people who use the word "privilege" in arguments nowadays, because they're not using it the way she thinks they're using it.
I don't think it's solely Ms. Johnson's job to tell people that they're using the word wrong. Now that you know the meaning, you can help us spread the knowledge (like I did by sharing that link).
This sounds like linguistic prescriptivism. For most human communication, the most commonly used definition is the "correct" one.