While I agree on the sentiment and certain parts, I think that you give us too much credit on the emotional maturity part. Many times I don't feel emotionally mature at all. XD

Girls don't receive an explicit emotional education. We are also "self taught" most of the time. We are told "you have to be this and that" but not "how" we should do it. And it is usually expectations a copying what older women do what "teach" us.

Now, boys can learn from older women and men. But at the end of the day, the way you teach someone to express their feelings has a lot to do with how you react when they do that as children. The way you taught them to be mindfull of other people's emotions is about telling them that they should be more carefull to not hurt other's feelings and so on.

But learning to be "emotioanlly mature" is an "ongoing" process. You can reach 100 years old and still be learning that. It applies to women too.

By the way, the reason many boys and men won't learn emotional maturity is because they can't get away with it. At offices and other workplaces they can show remarcable emotional matority if they need it to progress in their careers. The man who has angry outburst if his wive doesn't do what he wants, might behave perfectly calm if a customer, his boss or his coworkers don't do what he wants. He might accept not getting a promotion, but not that he is told no by a woman. Look around and you would see plenty of emotionally mature men at selective times and depending on who they are interacting with. And that is a clue.

The most emotionally mature people I know, were forced by life to be that way. A friend that has an ill brother that had to take care of herself as a girl because her parents were focused on the brother and that now takes care of the brother and the mother, another that needed to work since he was 16 to raise his siblings, the older sister that had to take care of the younger sisters... I think maturity is about need and the expectations of the people around you. And yes, boys are as able to learn as girls.