as humans, our arguably greatest trait is the ability to adapt to almost any circumstance. unfortunately that also often makes us accept unacceptable living conditions because changing them involves too high of a personal cost.

That's because you view things like this as isolated acts done by a few people. But don't forget, only 1/3 of US voters tried to stop a man who openly declared himself a fascist, had already had a direct hand in the spread of a world wide plague that killed millions.
The "they didn't know what they were getting into" excuse is no longer valid. And yet 2/3 of voters were fine with him being reelected . The reason those people weren't dragged from their mansions and beaten to death was because of all the other monsters who were protecting them. The people who weren't committing atrocities themselves, but benefited from it enough to help it keep happening.

You're not dragging Trump out and beating him to death. So why expect of your ancestors what you can't do today?

I'm not shaming nor advocating btw, just explaining.

That miners often worked naked or partially naked is definitely true. That children, men and women worked together in mines is also true. If it's legally allowed, then it's going to happen basically.

That there were owners who preferred children/women over men, is probably false. They will have tended to do different jobs in the mines, but I can't recall having ever read anything about a mine that preferred to not employ any male miners.

That the workers worked naked because of owner mandates is also going to be false, because those miners used to be paid according to how much they extracted, so there was no reason for the owner to have such a mandate. Instead it was the workers their own choice: some clothes hinder them in their work (heat, snagging, dust) + the job eats up clothes + they have to pay for their own clothes = they're not going to be wearing many clothes at work.