That's stupid. When you go on track you sign a disclaimer and no one should be held responsible for accidents, that's what insurance is for as shit happens, my old zt fiesta had track insurance as part of the policy, if I didn't have cover I wouldn't take it out as i wouldn't be able to cover the costs if I had a big crash
The same goes for the owner of the fiesta, he would be crazy taking a brand new car out on track with no type of insurance or being able to cover the costs of the repair,
We are all speculating that neither of them had insurance but haven't heard any thing from the owners of the cars, for all we know they could all be covered