That's content where the author did but care about masking. Don't mistake "there's lots of AI content that's easy to identify" for "AI content is always easy to identify".
Sure, but the average level of effort out there is so low that I'm not worried about losing my ability to notice this content instinctively any time soon. That's kinda why these tools are popular in the first place, after all.
(Also, a lot of AI operators come across like they wouldn't be capable of fixing those issues even if they cared.)
Really? Because I still see blatantly obvious AI-generated results in web searches all the time.