This is the First World. And as the OP says, quite a crazy one.
The populace is dumbly waiting about for someone to invent robots to do it all for them. Until then, I’m afraid much of working hoi polloi haven’t the desire to sweat, grind, push, strive or otherwise exert themselves for their daily bread.
I’m a drystone waller and run a mobile sawmill. In the last ten years I have yet to find anyone willing to work alongside. Many come in hope, but leave unable to make the living they think they deserve. Dust, dirt, danger and days which drag send them whence they came.
I’ve trained 30 people to an industry standard, and not one has taken up walling work, despite their being miles and years of work to do.
OP and others make valid points. Maybe there was some hidden threat to the workers in working in a hot room. But the wider point stands: effort despite adversity can be its own reward.