'Beauty' is a currency system like the gold standard. Like any economy, it is determined by politics, and in the modern age in the West is is the last, best belief system that keeps male dominance intact.
Most urgently, women's identity must be premised upon our "beauty" so that we will remain vulnerable to outside approval, carrying the vital sensitive organ of self-esteem exposed to the air.
No matter what a woman's appearance may be, it will be used to undermine what she is saying and taken to individualize - as her personal problem - observations she makes about the beauty myth in society.