"label it as character flaws because it implies that it is an immutable property" That's a misinterpretation, I believe. Nearly every story involves character

"label it as character flaws because it implies that it is an immutable property" That's a misinterpretation, I believe. Nearly every story involves character development; there's no reason to believe that it's immutable. Some elements of character may be less mutable, or at least assumed to be less mutable. But character overall is a continuous work in progress.