We did.
I still feel sexist though. Less than the average guy in previous generations, and certainly less than myself 20 years ago. It's not a yes or no thing though, just a long road towards an utopic goal.
I don't understand how one can possibly think this became a non-issue in 10-20 years or so. The world (including our beloved and enlightened western societies) isn't that simple. My mother is a Sociologist, a regional and national (Portugal) expert on this subject. She also writes children books, a few of which touch these subjects. 10 year old kids are sexist, this in a country where adults are convinced themselves are not. When you look deep, it's still there, hidden somewhere (or everywhere)... She made her thesis about sexism in school books, and it's incredible what you can find when you dig deep. How often the drawings of those 1st year books depict the man as the doctor and the woman as the nurse, etc. Things that embarrassed the authors, who themselves had the best of intentions and weren't aware of it.
This is not to say that it would be the same particular issue in Scandinavia or England, but to remind everyone that it's stupid to think this fight has been won. It's not, and if it ever is, it will still require resources and effort to maintain that egalitarian status quo we strive for.