The conditions given by Joziah Mullen made Carson Flores somewhat tempted.
Although he did not say how powerful the Divine Sword Sect was, seeing him come out victorious among a group of such formidable Immortals in a melee, and still talk boldly in front of powerful sects like the Divine Wood Palace without losing any grandeur, one can deduce that the Divine Sword Sect is likely very dominant.
As Joziah Mullen said, Carson Flores actually did not want to join a sect with overly complicated interpersonal relationships, as his identity as the Human Emperor of the Barbarian Wilderness Realm would inevitably bring many troubles.
In an Immortal Sect, the power of a Human Immortal is only considered mid-level; there are many who are more powerful.
If he could really join a strong sect and hold a high position, it would indeed save him a lot of trouble.