According to USAA, this is actually the law.
As I see it, this situation is no different than if someone backed into my car in a parking lot and did some body damage. The damage is done, and the offending party is required to pay fair market value for what it would cost to return the vehicle back to the condition was in.
Whether I choose to actually repair the damage is up to me. NTB should not have the right to damage my vehicle, and then not pay for the damage they did if I don't choose to repair it.
And mall cruiser might be a little - I do a lot of fowl hunting so I'm offroad quite a bit in the winter. But it's mostly mud and fields and not banging around on rocks and trees. Sliders would actually help for some of the areas I like to access.
In that case I would check the drains, have them cut you a check for a full dealer approved repair, patch up the rockers yourself, snag some sliders and have fun duck hunting this winter.
I agree, it is not different than a regular traffic accident/claim. They have the insurance and it sounds like you will be taken care of since you have done your homework.
Keep us posted.