>Of couse many other languages (eg Spanish, French) have many more male and females

In my language of choice (American Sign Language), masculine and feminine pronouns and identifiers do not exist as they do in most spoken languages. People and objects are defined and introduced spatially, not "sexually." If it does contribute to a broader acceptance of men-and-women-on-equal-footing, that contribution may be negated by the fact that most description is visually-based and therefore readily malleable to personal bias.

It goes back to the covert issue; words are not necessary for ill will.