The reason the idea puts some people off (me included, and I'm female) is that it would do nothing for the game series other than pander to a few loud SJWs, who would take the pandering as an invitation to demand more meaningless changes to a variety of other games, regardless of whether or not they make sense. There's nothing in LoZ that has really prevented girls or women from playing the games in the past. Heck, I remember girls playing Zelda 2 back when I was in middle school.
When I was little, I had no issue playing Mario games as Mario. Mario 2 was fun playing as Peach, but as a kid I understood that it was fun because the ALREADY female character had a chance to shine on her own terms. It didn't make me want to replace Mario with a girl.
If Nintendo really wanted a female hero in a game set in Hyrule, there is more than enough opportunity to get more out of the existing female characters. (Such as what they did in Hyrule Warriors, and even Aonuma pointed that out.) There is also nothing stopping Nintendo from spinning off the series, such as what was done with Tingle, or even setting the game around an entirely new character using Hyrule only as the setting.
If you really want a female Link that badly, get yourself an Xbox:
http://marketplace.xbox.com/en-US/Product/Kameo/66acd000-77fe-1000-9115-d8024d5307d2