This sounds like the usual libertarian answer to things like "eliminate government food safety inspection"; the idea being that the market would eventually reflect that some restaurants regularly sicken people and would then go out of business. Why is it better to let people be sickened, even if they can later sue, than put some stops up on risky behavior in the first place?
For both tree hazards and food safety, it's not a surprise when something is risky, even if you can't predict exactly when someone will have their house smashed by a falling tree. Why wait for the damage to be done?