I've come across the the symbols for closed solder jumpers in design libraries, and now I came across one in a design. I get why you might include an open jumper that could be solder closed, but what is the use case for a solder jumper that is already closed in the pcb layer?
Electronic – What are the use cases for a closed solder jumper on a PCB
In this case write protect is optional. And disabled by default.
Cut the trace if you want to enable it, link by solder to disable it.
Sometimes you have a need for normally closed solder jumpers.
Sparkfun: How to Work with Jumper Pads and PCB Traces