zero ohm resistors is not a fuse, it is simply a jumper with negligible resistance. It was mainly to make it easy for pick and place machines to jumper 2 pads since they cannot work with wire for jumpers. Its also easier/cheaper than jumper pins and a jumper block where the design doesn't need to be switched/changed.
Zero ohm resistors are often used as fuses, as they were in this case.
