I was in the same position as your gf a few years ago. I thought i would easily find a job soon so thought it a waste of time to sign on, cause i would be going back in a couple of weeks to sign off again, and didn't think it would be worth the trouble.
I had also never signed on in my life so was somewhat embaressed to do so also.
After a few months went by, i was still thinking ' i will get a job soon', meanwhile i was paying a mortgage and all household bills by credit card with no help at all.
i eventually did find a good job, but am still paying of my credit card debt (and will be for a good few years to come).
Older and wiser, i would not hesitate to sign on now if i found myself in the same position again.