Why don't AI doomers short the market?

A lot of effective altruists believe that advanced AI augurs doom, yet they don't short the financial markets

Here's a puzzle: many people in the Effective Altruism (EA) movement are AI doomers, but they don’t make financial bets in support of their bearish stance. In other words, if you think that AI will destroy the world, then why not be short the financial markets? Tyler Cowen recently asked this question. He admires the EA movement’s eagerness to learn abo…