I was going through the Grammarly blog about indefinite articles and its usage and the writer used this to exemplify the omission of articles:
Incorrect: The creativity is a valuable quality in children.
Correct: Creativity is a valuable quality in children.
I don't understand why that rule doesn't apply to a sentence like "The creativity that man had was eccentric", because it certainly doesn't sound right to say "Creativity that man had was eccentric."
Is that an exception or a completely different thing?