Yeah, and it used to be that the man was automatically believed. Neither are perfect, but I'm glad that these days women are at least taken seriously when it comes to the issue of rape.
I don't think I agree with you anyway, if you read some testimony from rape victims it's clear that the idea that women across the board tend to be believed and that men are assumed guilty doesn't really hold water. The conviction rate for the crime of rape being so much lower than nearly all other crimes kind of works against the idea that men are by default assumed to be guilty.
Edit: I do see where you are coming from though, we need to try and avoid assuming anyone's guilt, being falsely accused of sexual crimes is awful as it's something that will always be a stain on your reputation.