I disagree. Women can wear leggings, plimsolls and a stripy top no worries. Men have to wear proper trousers, suitable (proper) shoes and a proper shirt.
Women can bend the lines on office wear much more than men can. But i guess it comes down to the individual offices.
I use to work in an office before I made a career choice to work outside. When i did the rules for men were quite straight and narrow, for women it's much more flexible. For example a teddy style sweater maybe even turtle neck with a black skirt, tights and again plimsolls or even heals would be fine in an office. Women can wear much more comfortable clothes to men in offices.
Fair play who cares.