And that point is, in my opinion, stupid. I run docker in production here, and if I had to make a docker image for each application with all services integrated, that would become a maintenance nightmare the moment you have to manage more than say 10 images (!not containers) built like that.

You lose a lot of the flexibility by integrating everything in one big pre-configured blackbox. In some cases that's nice, like when you actually want to ship a blackbox to customers, but when managing infrastructure? Thanks but no thanks. When you have proper configuration management in place, spinning up and configuring an extra postgres, apache, nginx, jboss, redis, ... whatever container should be dead-easy, otherwise you're doing something wrong.