I think it's a difference of reading levels.

AI 'writing' makes me ill, but that's happening because I can 'feel' the prose's samey hollowness in every paragraph.

But! If someone is just moving word by word and is focussed on just the gist (the average reading level is '6th grade' here in the states), then it will not repel them the way it does us. Also, AI's grammar is impeccable, if bizarre, and the word choices can be facially erudite, so that might also be mistaken as a signal for competence where none exists.