All the Gods who participated in the War of Sealing Gods in the Divine Land World were not of poor aptitude; in fact, every God who had the qualifications to emerge from the God Sealing Battlefield and claim their own Sealed God Position was no weakling.
The War of Sealing Gods back then was of a magnificent scale, sweeping across the entire human race and Demon Race. It was a battle beyond imagination, with the elites of both humans and demons taking part. Even if the term "elite" wasn't very precise, these individuals went through so much combat and tempering that they were indeed forged in the fires of war.
Therefore, those who could ascend to the Heavenly Court and be enthroned upon a Divine Position were, without exception, the cream of the crop among cultivators of their Realm. Each of them had defeated countless opponents and competitors to earn the right to ascend to the Heavenly Court.