It's a consequence of the Java era where the black-box tendency of apps running in the JVM and the "javaschool" educational system conspired to produce a large

It's a consequence of the Java era where the black-box tendency of apps running in the JVM and the "javaschool" educational system conspired to produce a large number of programmers who could produce web apps, but didn't know anything about administering the boxes they were running on. Thus ops teams started loading up with admins who just made sure the servlet containers could spin up and the underlying machines didn't run out of memory or disk space, but had no idea what was going on inside of the app.