Another problem is that while you are busy moving boxes, you can't look for a job that actually suits your skills. Sure, it beats starving, but "just do any job" might not actually be the best career advice in every situation.
Of course, there is the difficulty of finding time to apply for other jobs to weigh it against, but I think the balance tips the other way.
I used to have a lot of appointments with the dentist when I was looking for a new job.
More recently, I just made them meet me outside office hours.
In fact, in a lot of professional companies they really would understand, "yeah, but I have a job to cover the bills so do you mind if I meet you at 6pm?"
And, no, I have never had dental insurance. I paid myself. I had a guy drill a tooth out raw (sans painkiller) for a much lower price once. That was quite the experience.