The showing up thing is huge. I work in a machine shop basically that helps mass produce food for fat Americans and furriners, as well as building our robot overlords. At almost 44, 3 welders are older, two are younger. We have several machinists in the sixties. We actually hire that old. Willing to take someone who served french fries and teach them to run a mill. If they show up... And you only get drug tested now pre employment or if you go to the hospital on the job. And it's a hurdle. Even when you tell them wink wink, nod nod that they only need to pass the initial screen.