You are seriously underselling what LLMs do nowadays. It's not just that the grammar is correct. In most cases, the answers are substantive and factually correct.
You can ask fairly complicated questions, and it will usually reason correctly and give you a high-quality answer. I ask about programming, physics and math, and it usually answers on the level of someone with a high level of training in those fields.
It sometimes fails in strange ways, but you can't just write off all of the high-quality answers LLMs give as nothing more than plausible-sounding English.
You can ask fairly complicated questions, and it will usually reason correctly and give you a high-quality answer. I ask about programming, physics and math, and it usually answers on the level of someone with a high level of training in those fields.
It sometimes fails in strange ways, but you can't just write off all of the high-quality answers LLMs give as nothing more than plausible-sounding English.