It’s not about authors using AI, it’s about authors not respecting the reader’s time.
Writing has a multiplicative force. The writer only needs to spend time writing it once. The text will reach thousands of readers who will collectively spend a lot more time on it than the author.
If even with that asymmetry, the author is not willing to put effort into writing it, I’m not going to bother reading it, regardless of the text’s substance. I’m just not interested.