Domestic abuse as a pre-existing condition

I tend to be in favour of parties being allowed to contract any which way they choose on most issues - and I think it's good that people should be able to pick and chose aspects of health insurance to find a policy that fits them.

However, I draw a pretty big exception line under the policies which are classing domestic abuse as a 'pre existing condition'. Whilst I can see it is perfectly logical from the company's point of view (people who suffer domestic abuse once are more likely to suffer from it again in the future), I just can't imagine what was going on in the mind of the individual who came up with this one in the first place.