Although quantity does not equal quality, there are times when it can indeed have a certain impact on the opposing side. When the strength of the clone Beastmen in Zhou Tian's Personal World suddenly increased nearly tenfold while maintaining the same quality, their combat power would also have definitely increased to some degree, even if not by tenfold.
For those Demigods, perhaps a few dozen King Level clone Beastmen might indeed not pose too much of a threat. However, if there were as many as a thousand clone Beastmen at Zhou Tian's command, then any Demigod facing off against that Large Army of clone Beastmen would certainly feel the headache.
After all, although Zhou Tian's clone Beastmen were not as good as real Beastmen, in terms of strength, those clones were still considered King Level Monsters. Essentially, Zhou Tian's clone Beastmen were only one level behind those NPC Demigods in terms of power.