Kill6BillionDemons II: The Successor's coming will be followed by 108 burning threads

[Professor Gnoll]

It's important to remember that the stories about Aesma are at least partially apocryphal. The story you're referring to, for instance, has her speaking to and interacting with YISUN as if they're a person, which is patiently impossible. (YISUN's holy suicide is the reason anything exists, including Aesma herself, so at best Aesma can only consult the fragment of YISUN that exists within herself, metaphorically speaking. YISUN sitting around talking to his disciples is patient nonsense or, at best, a metaphor.)

In the same way Allison talking to Zoss is impossible, since he's dead, right?
Remember that YISUN exists outside of causality.
...the stories are still not necessarily literal, but that's not the best reason why.