Women managed to change the attitude of society to them wearing trousers. By doing it. By putting up with the crap. Basically how women have achieved every advance in their position and status over the generations. Not by whinging about it not being fair that girls have three choices of clothing for their bottom halves and boys only have two.
But that is because women wanted to wear trousers, though not sure why when they are masculine, uncomfortable, cause thrush etc etc.
It's not men and boys asking to wear skirts, it's you saying they have to so why would they be fighting for it?