Yeah, researchers have already developed some AI (bots) those can write contents, codes and do other stuff. But they have some limitations which can be sorted with the help of human brain.
I have written many articles on AI research for one of my sites. But don't worry about automation. If you want to start building your own bot, you can use open source directories for reference.
Even I own an AI and currently working on its modification. (Inspired by Jarvis in Iron Man and Jarvis by Mark)