Big and Small Liu meticulously explained to Tie Dan all the flaws in the monster's skills, not due to arrogance, nor due to naivety.
Having cultivated to the Core Formation Realm and forcing a Nascent Soul Demon to flee in panic, the two of them were not to be taken lightly. So, in short, they were perceptive enough to see that Tie Dan and Baiyu, this pair of Daoist companions, were blessed with strong fortune and great skills, and thus entrusted them with the task of demon extermination.
Of course, Big and Small Liu also wished to seize this opportunity themselves, to deal with that roe owl, slay the demon, take its elixir, and earn some Heavenly Materials Treasures, Immortal Fate, and luck, but the problem was that it was impossible to achieve it with just the two of them.