They need to justify their existence since they have failed to catch multi billions of dollars of fraud, waste and abuse.
It became part of the computer field.
I don't know if this happened in the other services.
If there were still real crypto people running the communications it is doubtful that Signal would have been used and Goldberg couldn't have been included as all members of the call would have to have been in secure locations.
When the field was dropped, I figured it was only a matter of time before something like this happened.
Just because something is encrypted doesn't mean it is secure, you still have humans involved, few of which really understand real secure communications.