True, but these aren't becoming best sellers. It's a bigger problem for Amazon than for readers in a sense, as they need to implement a good way for people to filter out these offerings so customers don't simply walk away and go back to physical bookstores (perhaps a blessing in disguise).
I'm referring to high quality content not low effort spam such as AI books flooding amazon, which was already flooded with low effort spam books and other junk product before AI.