The verdict to be passed on the third planet around Sol was never in doubt. The Old Ones on the fourth planet were not omniscient and in their way were as provincial as humans. Grokking by their own local values, even with the aid of vastly superior logic, they were certain in time to perceive an incurable "wrongness" in the busy, restless, quarrelsome beings of the third planet, a wrongness which would require weeding, once it had been grokked and cherished and hated.
But, by the time they would slowly get around to it, it would be highly improbable approaching impossible that the Old Ones would be able to destroy this weirdly complex race. The hazard was so slight that those concerned with the third planet did not waste a split eon on it.