The parable of tigers in the grass might demonstrate a selective pressure towards caution, but doesn’t demonstrate any benefit towards ascribing agency to natural phenomenon.
The agency of the entity which caused the rustling is somewhat irrelevant for the hunters. The important belief for their survival is that this rustling entity is dangerous. If they hold this belief but attribute the behaviour of the entity to randomness, they’ll do just as well.
The agency of the entity which caused the rustling is somewhat irrelevant for the hunters. The important belief for their survival is that this rustling entity is dangerous. If they hold this belief but attribute the behaviour of the entity to randomness, they’ll do just as well.