Style is also part of the content. Word choice, grammar, register, and tone all affect meaning and communication of that meaning. The medium is part of the message.
So your statement betrays a significant misunderstanding - there is no neat clean divide between style and content.
Also, LLMs often generate text that is plausible, but wrong, in ways big and small.
No, the difference is in the education/experience of any given human, which is mostly gated by age. Like you'd generally expect someone young to make a lot of mistakes, and as time went on they'd learn and make fewer. Pretty much the same with LLMs, which have been around for... a bit over 5 years now? What would you expect of a 5 year old acting with intention? Or 10? Or even a 15 year old?
So your statement betrays a significant misunderstanding - there is no neat clean divide between style and content.
Also, LLMs often generate text that is plausible, but wrong, in ways big and small.