That wasnt always the case. When I started playing quite some years ago the guild I joined at that time was like 95% male. And I left numerous guilds because of the somewhat tacky conversations that went on that I would classify as toilet humour, particularly gender based. Early wow was very much a boys club. If you look at the pictures of the early game developers, I think there was like one female to a room full of males. It must have been ‘fun’ working for Blizzard back then as a woman.
The game was designed primarily by males for males. I sincerely believe that and in those days off colour humour was the norm. So its hardly surprising that bits of that still exist in the game today and that a large proportion of the stuff being changed or removed is from vanilla, TBC and Wrath eras. Note, I said a large proportion. There are later things being altered but they are mostly changes to do with altering the names of things relative to persons who have left the company.