It is factual to say though, that a very short skirt gives total freedom of movement.
You didn't say that though. You said a short skirt gives greater freedom of movement than trousers or shorts - you didn't state what style skirt nor what style trouser nor for what activity.
So a short pencil skirt gives greater freedom of movement than lycra workout trousers does it?
Rubbish. Film stars wearing short skirts don't appear to have great freedom of movement as they try to get out of a car when compared to those wearing trousers.
You made a general statement which is incorrect.