It's called modesty.
Not modesty for me,,I have fat knees, really. I look dreadful in short skirts. Twenty years ago I looked adorable and wore them short.
You have to have good legs to wear short skirts.
I’m not opposed to modesty, but there is nothing wrong with a woman wearing a shorter skirt/dress if she has the legs for it if she is with her husband or boyfriend. The length would vary depending on the situation. A slightly longer than finger tip length would be O.K. for a cocktail party if the woman has good to great legs. I think a woman should empasize just one party of her body at a time. IOW, a short skirt/dress should not be combined with very much cleavage.