That's the point, the DoJ isn't spending time, they're regurgitating material produced by lawyers working for the carriers.
Why is DoJ sending messages on behalf of the carriers? Because the current administration has demonstrated it will do anything they're paid to do.
Doesn't the DoJ have enough on its plate? Like what? The purpose of the DoJ is /ostensibly/ to protect people from abuses by people who have more money/resources than them. Including the police. The GOP/WH has demonstrated that human rights are low priority compared to most other things (especially those that can pay them).