But it's in their best interest to assume it wont happen.
If I correctly predict, as an actuary, the demise of the industry, I don't win anything. If I can calculate a superprecise premium for my insurance product based on this being true, I have an expensive product that underperforms the competition, and management is not happy. Whereas if I ignore superlong trends, I get to earn my salary, probably until I retire - you know, it probably won't happen. I value a product competetively. And if we miss, it won't be my only problem. So even if I can do the right thing, I will be punished for the event.