I'm not. I'm pointing out that you're presenting it as something anyone can just do, which is far from the case.

Apart from many people simply lacking aptitude in the jobs you're talking about (not everyone can learn any trade), dozens of millions of people are working the equivalent of more than a full time job to (most often with limited success) make ends meet. They don't have time or energy left over from their CURRENT job(s) to retrain and/or apply for other jobs. It's not like they can just take enough time off without being fired.

And then there's the fact that a large portion of struggling people live in areas where those kinds of jobs at that kind of pay either don't exist at all or there's hundreds if not thousands that want the job per opening.

And no, those people can't just move. Moving costs a lot of money, time, and energy that the average working poor simply don't have.