I agree with you, tried Writesonic a couple of weeks ago and was struggling to produce an article let's say 1500 words without spending at least 2 hours.That's a trade secret, young man!
I can confirm this works. I was doing this last fall slightly & had success with the ~20 articles I ended up posting.
Not much more work than using an AI or even writing the articles yourself. It depends on if you want what you're working for or not.
Writing articles myself from scratch is out of question.