Another thing that you should mention is that lots of languages grammatically divide all nouns into masculine and feminine, in a more or less arbitrary way. A lot of languages also force you to use the appropriate masculine or feminine case for all verbs and adverbs.

In Hebrew, my native language, there is simply no possible way of talking to or about a person without knowing that person's gender. Not even "how are you" or "nice to meet you". The language forces you to think about gender. That's one reason I don't expect people to stop thinking in gender-defined ways.