If effective altruists want to be known as half-wit philosophers who follow their reasoning off a cliff then sure, they’re free to commit themselves to the repugnant conclusion as well as diverting all the money they can away from malaria nets and toward “AI safety.” If they want to be known as successful social engineers who have saved millions of lives by informing givers how to more efficiently allocate their resources, they should probably steer clear from those directions.