That's exactly what they do. Most of my family falls in that category, and a desk job doing customer service at AT&T with reasonable health insurance is a big fucking deal. Getting that higher paying job in that market isn't as easy as you think it is.
Do you really think people work at Walmart because they love the job? Check out /r/target for some insane stories. If forced to choose between insane working conditions or take their chances, some are willing to take their chances.
And bad employers found their labour pool was more selective. They thought the root cause was Unemployment Insurance and people sitting home, but even after those programs expired they still faced difficulty hiring.
So, I don't think people are siting home watching Netflix; but they are unwilling to work for a crap boss serving crap customer during crap hours for crap money, because there are options.