That isn't really true.[0] The application of calculators to a subject matter is something that does need to be considered in some use cases.
LLMs also have accuracy considerations, and although it may be to a different degree, the subject matter to which they're applicable has a broad range of acceptable accuracies. While some textual subject matter demands a very specific answer, some doesn't: For example, there may be hundreds or thousands of various ways to summarize a text that could be accurate for a particular application.
0: example: https://www.reddit.com/r/calculus/comments/upjdn4/why_do_all...