You raise a good point, and maybe a bad one...
It deals with how Sync and the Radio, share the same fuse in one line to power them together...
The Radio "box" in the Dash is kept separate for a reason.
The Radio "box" that holds the audio amp/USB/AUX - is fused separately.
Why would this be bad?
Well if a fuse did blow, you'd lose the ability to even tune the radio; no presets no nothing - also could affect SYNC (if equipped) and all it's memory.
Depends on which fuse blew.
If one or the other fuse simply blew due to a short or overload, that's one thing, replace it.
- - but it may need service if replacing the fuses doesn't bring it back.
Because the wiring may have overloaded, and wire feeding the amp may have opened or the audio amp inside the "box" is toast...
Sync may have lost "memory" and won't work right (defaults on every time you start the vehicle) - clock e&c...