I do write some speculative fiction - one of my worlds is a matriarchy, in fact. The roles of men and women are very different to say the least. They'd be unrecognizable, to us. My protagonist is a woman, and her experiences are unlike those any woman would experience in real life. It's what makes speculative fiction fun!

I suppose you could write speculative fiction in a world in which all children are grown in vats and raised by the government. That would obviate the difference in biology, and issues such as abortion, reproductive and parental rights, etc.

But since this was very obviously not what anyone was talking about, it's rather beside the point, isn't it.