LLMs don't provide correct answers to all questions, but claiming that they don't provide answers at all seems absurd.
An unreliable "answer" is really not an *answer* in the traditional sense of computing. It is merely information waiting to be verified.
No one has to verify every calculation in a spreadsheet. If they reasonably needed to do so, spreadsheets would be more like an LLM --- and a lot less useful.
Is an answer that is correct by chance the same as one that is correct by reason?