LLMs totally have a beginner problem. It's much like the problem where a beginner knows they need to look something up but can't figure out the right keywords to search for.

Also chatgpt has never called me an idiot for asking a stupid question, having not read the question properly, and making the assumption it was the same as an existing question after skimming it. I wouldn't ask SO a question these days, the response is more likely to be toxic than helpful.

Chat interface has an advantage of having user-specific context and follow up questions, so it can filter and refine answers for the user.

With StackOverflow search it's up to the user to judge whether the answer they've found applies to their situation.