Lozjam
A Cool, Cool Mountain
You are being a hypocrite in this argument. You are complaining of people bringing social issues into games, while bringing social issues into games over an option that you can very easily ignore throughout your entire playthrough. Male Link will still be a main design for the series and the representation of Zelda. However people will have an option to play as a girl. There's nothing really wrong with that.The problem is that this type of thing never applies to games that started off with female protagonists. You couldn't get a male Chell in Portal, and you can't get a male Samus in Metroid, and, no matter what people like to say about Link being an "avatar," he's been a male for 30 years. So what if his design changes a bit between games? I don't see Mario with brown overalls in Mario games anymore.
Don't want to worry about a female link? Okay. Just play as male link.
You have been able to name link ever since the start of the series. He was actually the first to be a name your own protagonist. I think having an option for a female link is the next step.
Also, this is besides the point. We do not even know if Link is going to be the one who turns into a female. You could very well just have another character that's female. Which I think is far more likely then a gender swapping Link.