The same actually, both seem to be mostly used for wanking.

Despite a vibrator only having one oddly specific use-case, LLMs actually do have more. To me, personally, they start to replace the search engines, which become more and more shitty and useless each year. At least an LLM can summarize this pile of garbage faster then I could manually. Also more than decent in translation, quick product comparisons, calculations and even for rapid prototyping in code (nothing major though, or just for giving new ideas).

Of course, if trained on shit, they become shit. We're still at the dawn of things. Haters will hate, ignorants will ignore. And many of those that do not understand it, will reject or even fear it. It was probably the same when the car, aeroplane or computer went mainstream first.