Each race had its own world, depending on the power and numbers of the race the world had variation, so obviously the Pillars had the most powerful and largest worlds. This also meant that if there was a conflict between the Pillars, the destruction was truly massive.
However, the races almost never fought against each other in full, often some organizations or individuals, but not the entire race at once. Even the Angels and Demons had only a few wars in their entire history, which was a true record.
For a war to break out between the two races, very serious reasons were needed, so much so that massive destruction of each other was the only option.
Because of all these factors, the rulers of worlds or leaders of races might not be ready for a surprise attack unless there was a long lead time of years. That was exactly what the Constructs had done now.