The problem with AI writing isn't its style, it's the content.

It's full of fluff. Analogies that sound like something a 12 year old would make, but make no sense when you stop to think about them.

It's full of baloney that the author didn't even intend to communicate.

That's where the "soulless" part comes from. There's no consistent mind behind the writing with opinions of its own, formulated into one understandable framework it's trying to convey. It's just a mishmash of BS that only superficially resembles it, made to trick us.