> A dead-end job just means that there is nowhere to go from there, your progressed as high as you possibly could in it, and staying there won’t help you with your future career elsewhere neither.

If you love your job, you wouldn't want to go anywhere else or "progress" in your career. BTW, what is that "progress" in a career? Endless better pay? Longer job title? More work? More difficult work? Switch to management (that's a different career to me)?

The example is not relevant. That's not a dead-end job. If there's no work, then that's no longer a job at all.