This is your point that I am addressing:
You don't think they keep Nancy as the House Democratic leader because of her looks, do you?
and I ask why you are interested in criticizing a person's looks?
It is a fallacy.
Perhaps you don't know what a fallacy is. I mean, you didn't know what a metaphor is even though you practically read the definition for me:
https://web.cn.edu/kwheeler/fallacies_list.html