If you can trust the model is at least as accurate as wikipedia then it becomes a drop in replacement for every task you do that requires wikipedia.
There are a whole range of tasks that can’t be done today with an LLM because of the hallucination issues. You can’t rely on the information it gives you when writing a research paper, for example.
For starters because one of the first products people decided to use these models for is a search engine, and I don't think it is a stretch to argue that search engines should have a positive relationship, rather than indifference, towards facts and the truth.
There are a whole range of tasks that can’t be done today with an LLM because of the hallucination issues. You can’t rely on the information it gives you when writing a research paper, for example.