Stop in for a cup of coffee

Ok. So we have two wires attached to the battery.
One with a fuse in it and one with no fuse it.
The fuse burns.
Why would people be advising to look for a short along the wire no fuse?

BAT---------------------------------Starter
|
|
Relay-------------------------------Starter Solenoid
|
|
Fuse Burned
|
|

/Rant over /