The purpose of StackOverflow was never to get askers quick answers to their specific questions. Its purpose is to create a living knowledge repository of problems and solutions which future folk may benefit from. Asking a question on StackOverflow is more like adding an article to Wikipedia than pinging a colleague for help.

If someone doesn't care about contributing to such a repository then they should ask their question elsewhere (this was true even before the rise of LLMs).

StackOverflow itself attempts to explain this in various ways, but obviously not sufficiently as this is an incredibly common misconception.