The definition of the word woman is simple and clear. There is no ambiguity. It's just a simple matter of biology. However, there are extremists who insist that it is difficult to define the word. They talk about gender fluidity and other nonsense as if their fantasy world has some intellecutal validity outside their circle of like-minded individuals. It's important to not allow a small group of mentally unstable people to dictate to the majority how to use language. Otherwise, anything can wind up meaning anything and there will be nothing but ambiguity and meaninglessness in the world.