Yeah I feel like whoever does get cast as the first female doctor would not have an easy time of it, it would be a lot of added pressure :(

And interesting, do you have a link to what he says? As I said above, I'm not necessarily opposed to the idea that Gallifrey is very gender-fluid, I'm just not sure that the canon backs that up when characters have always stuck with the same gender time and time again until this latest regeneration of the Master