Earlier quoted context omitted.
I think the idea is that when kids are growing up, they make subconscious connections and observations about the world around them. If a young child plays video games and consistently sees that boys are always the hero, they might extrapolate that to simply: "Boys and always the hero". I don't have a strong opinion on the subject, I just thought I'd try and explain the position as I understand it.
I'm sorry but I'm firm to believe that the problem lies to the mind that makes the distinction first. If someone sees Link and the first thing that pops in his head is "what a shame he's not a girl" and retcon the intended storytelling to keep the content on par with their expectations then I certainly can't blame the game's creator. Not to mention that the boy isn't always the hero. I'll just bring another Nintendo…
Maybe the plan is to make a bunch of noise about it so eventually game creators get used to the idea of catering to both halves of their audience.
I hope it works.