Content that isn't trying to entertain me specifically? How dare!

In seriousness it's probably being released as a way to speak to USPS union leaders, logistics industry wonks, and others for whom it would be a benefit to get general information out in a way that isn't a deeply boring email.

If you were following USPS news during the 2020 election, you know that the last postmaster was a nightmare bastard who was instrumental in weakening US democracy.