Compare setting up Docker and Wordpress to what Animats just said. Then you'll know why that's hilarious. You've managed to move the problem from one piece of software to another.
Is it as simple as filling out a form on the Internet, getting login credentials, and not thinking about it from there? That is automated and manages itself. What's the Docker + Wordpress version of that?
So, you don't have to install Docker, administer a server, do updates, back up data, and deal with ISP's over outages? I didnt realize Docker was that far along in zero management and maintenance. Send me a link so i can try that out.