Exactly. This is, imo, the biggest difference between many of those types of jobs now and 20-30 years ago. You have to be willing or financially able to make the move on a gamble or pay lots of money in transportation applying and interviewing for a long distance job, the jobs require certain skills that aren't as common or "desired" with vocational trade classes becoming rarer, emphasis on college, and less grants/loans for trade schools compounding that problem. Then there is practically no real on the job training like there used to be. You're expected to have lots of experience before you even get in the door, thus narrowing the pool down further.
Basically, there's technically positions to fill but the standards are often too restrictive for the modern labor market.