Why do you need several human/ai iteration rounds and dozens of reviewers for a blog post?

Because it's important. You don't want to read my raw writing. Try to read my HackMD and you see what you'd get. It's always taken me a lot of work to release my medium and dev.to articles. Grammarly working hard, and multiple human editors. It scales with how many people I think will read it. A release announcement is important. It needs to be clear and it needs to convey the most information in a very short span. You don't have the privledge to meander in this sort of thing. And meandering is exactly what I'd do if left on my own.