If you look into those statistics, most assaults take place within relationships and are not even considered assaults by the assaulted women ( it is the interpretation of the people conducting the studies). Outside of the home men are actually more endangered of violence than women ( not even taking violence in prisons into account).

Don't want to defend violence in relationships, but I think it is actually a different problem than men's tendency to rape (ie people are bad at choosing mates and conducting healthy relationships)