First thought: In my experience, this is a muscle we build over time. Humans are pretty great at pattern detection, but we need some time to get there with new input. Remember 3D graphics in movies ~15 years ago? Looked mind blowingly realistic. Watching old movies now, I find they look painfully fake. YMMV of course.

Second thought: Does it _really_ matter? You find it interesting, you continue reading. You don't like it, you stop reading. That's how I do it. If I read something from a human, I expect it to be their thoughts. I don't know if I should expect it to be their hand typing. Ghost writers were a thing long before LLMs. That said, it wouldn't even _occur_ to me to generate anything I want to say. I don't even spell check. But that's me. I can understand that others do it differently.