Add to that a justice system also mostly automated and you are quickly caught in a Kafkaesque nightmare you can't get out if something goes wrong. Imagine the justice system run like google support. Even if something is clearly wrong you can't clear it up if you are not a famous person with a big Twitter following.
On the other hand, a justice system which has most of the menial tasks automated might have more resources to do the important tasks well. Similarly, Google could have a mostly automated system detecting violations and such, and also a good human support system with power to override the decisions of the former; the two are not really incompatible.
They said the same thing about banking when we got ATM's. But banking has only gotten worse, more impersonal, and more frustrating and alienating for the average person.