I'd argue that the possibility of paying maintenance without visitation right is 100% fair. If you are an abusive prick, then you should not be inflicted on your kids. However, that does not absolve you of your responsibility to provide for them.
No.
If you're abusive, you go to prison. Your wife proves that you are abusive, and you spend time in jail, and because of that, you cannot see your children.
But this has to go to court. You have to be found guilty. A judge has to agree.
It cannot simply be, he is a man and the mother said she doesn't him to see the kids. No, wrong. They are both the parents. Unless one of them is mentally ill or a criminal, then they both have EQUAL rights. You cannot just make an accusation of abuse - which is what countless mothers do. You have to prove it, in a court of law.
The law should not take sides, but it does now.