Most of this "knowledge sharing on online Q&A platforms" is NOT creative activity. It's endless questions about the same issues everyone is having except the system developers themselves. Much of this is just displacing search platforms.
It can be simultaneously true that (1) most answers on online Q&A platforms are not novel, and (2) that LLMs reduce the proportional novelty of answers.
For the purposes of the argument it is: these are the interface between the unseen "real world" and the LLMs. So information coming from these forums, even if regurgitated from "real life" or "education" or "experience"... the writer or someone else's, is a "creation" to the LLM.
Most of this "knowledge sharing on online Q&A platforms" is NOT creative activity. It's endless questions about the same issues everyone is having except the system developers themselves. Much of this is just displacing search platforms.