The entire comment chain is about LLMs, not chatbots.
A LLM's output is deterministic.
A from an IT system point of view, a system using LLMs is only non-deterministic if the system adds randomness. The randomness isn't inherent to the LLM and any added randomness is typically created by a seed which could be replicated across number of system images leading to deterministic output across every image clone.
From the point of view of the typical user the computer may as well be a magical box controlled by a tiny fairy so any talk of deterministic output is irrelevant.