I am questioning why they are observing that difference for football only and not other sports?
They are accepting that women are weaker than men so cannot cycle, run or swim as fast, or hit balls as hard but that is OK. But they are not accepting that (after the FA succesfully destroyed the massive game of Womens football in the early twentieth century) the women's game is many decades behind the men's game and may never catch up, but what we have is the pinnacle of women's football.
http://www.bbc.co.uk/newsbeat/articl...omens-football