The supporters of the legislation say the law is to address a court ruling that citizens have no right to reasonably resist unlawful entry by police officers. IOW, irrespective of whatever case or reason for the ruling - as the ruling effects all cases.
If the reason for the legislation does not concern any particular case or situation, why should the legislation?
Are you saying the law *should* have some sections or provisions specifically for domestic disputes that isn’t covered in some other law?
The cops will defend themselves quite well against any charge that they could have shown up. Obviously the law doesn't require them to get involved. But the history takes things beyond that and tells us that THEY'D BEST NOT!