I'm... not sure if I follow any of that, to be honest.
It would be a reaffirmation of many men's concept of women as manipulative and heartless (something I hear all around me in case you're wondering where this is comming from)
How? I mean, I honestly don't understand how a woman being capable of raping someone, something that is obviously a thing that is true in every sense but the legal one, would somehow reaffirm men's concept of women as manipulative and heartless. Women are also capable of being tried for robbery, and murder, and I've never heard of an argument involving that as a justification either. I'm honestly not seeing the potential connection here. Could you try explaining a bit more why you think this would be the result?
giving credibility to some of their quite insane complaints about how evil their wife/girlfriend/mistress really is
Some people really do have evil wive's/girlfriends. I think there's more than enough social pressure against it that it is unlikely men are going to go around saying they've been raped, though, especially as justification for complaining. And if they were inclined to do so, I don't see how the law being in line with how people already consider the situation would be the thing that pushed them over the edge. Do you see these people claiming to have been raped? Is that the issue?
Plus, "if women like rape then they must like being raped".
Where would it be said that women liked rape? How would people interpret the law this way? No one interprets the fact that women are capable of robbing as justification that women must then like being robbed. Not only does it not make sense, I just haven't seen any evidence that this would even approach being a
likely (if completely illogical) association.
Finally, wouldn't those already so inclined to misinterpret something so badly be the type that are
already absolutely certain women are capable of rape? Do you really think it would change anything for them?