Everyone should have the right to chose. Skirt lengths at school have always been an issue. I'm mid 40s, ours had to be A line and below the knee. They were hideous so on the way to / from school we all rolled them up and then looked even more ridiculous with a spare types of fabric under our shirts...
Now I never wear trousers for work, smart trousers don't suit me skirts and dresses do. I do wear palazzo style and occasional jeans at home.
One of my DTs almost exclusively wears dresses and skirts, the other shorts and trousers. One wears a play suit to school, the other a dress (y6).
Removing choice is just so backward.