If your company lost thousands of man-hours on a tool and has nothing more to show than a blog article with half the facts coming out of the author's head and the other half boasting about bad production practices, would you prefer me to sugar coat it?
A hire that knew linux and docker, would solve the problem.
I work with docker since 2013. I came to a team with devs that already used docker. I didn't know anything about it at the time. They gave me a docker image with a JVM based app, that had a two years old JDK, ran as root and the container was ran with privileges enabled. Did I have to know docker to tell them that this was nuts? Nope, I had to know ops. For the same reason I knew AUFS before I learned about docker and I knew very well that I would trust AUFS on my NAS for media storage but not as storage for a production database.
Did I ever tell the devs how to write java? No. It isn't on my job description for a reason.