Abuse is often insidious and the law should allow some room for feelings on the part of the victim. I don't have a legal mind unfortunately, but I believe there should be some weight on the victim's fear and not just a bruise that a doctor can see. The DV system/industry is terrible and involves a lot of bearing false witness, I'm not defending how things are.
Unfortunately there are unscrupulous people that win or use the legal system to their advantage because they can lie and fake and mix half truths no matter how just the laws are.