There are different sex-roles in the mammal world; but if we were to let them be our examples as to how to live, we wouldn't be any different than them. We're not animals, so if they do things differently, we are not called to do the same.
I don't agree with the "All females have to enjoy shopping, etc." or "All men need to love sports and drinking." That's silly, agreed. But some things (like sports teams and bathrooms) really should be separated by sex. That doesn't mean that the members of one sex share the same "gender," but that some things go beyond how we "view ourselves." Anatomy, hormones, etc. are a fact of life.
As for the "getting rid of pronouns"--why? Why should it be discouraged to call a girl a "she" and a boy a "he"? Hello?