During college Summers I worked in a shop that produced big welded steel rings for tires, aircraft engines, and a whole bunch of other things. We clocked in at 6AM on the dot or were docked pay and worked to 4PM with a 30 minute lunch break, and a 15 min break at 10AM. All day was spent with ear plugs in, heavy gloves, leather aprons, burn proof sleeves and potentially more shit to protect from weld-spray and whatever else, goggles and sometimes a full face shield.
First couple days there, I would come home and hallucinate from the sensory deprivation I experienced all day. I would blow pure blackness out of my noise when I got in the shower and it would still be there during the weekend. I still have a couple burn scars, that I didn't even feel at the time because it was so hot it just seared the nerves right off.
More than half the guys chain smoked cigarettes all day and had the jacked forearms you've ever seen from hoisting and moving heavy metal parts all day.
Not once did I hear a complaint about their working situation, or if it was adversely affecting their health.