I lived almost a year in a ~3.5x3.5m hostel room with 3 bunk beds (so 6 people total). Basically enough space to fit beds and nothing else, that's about 2 m^2 per person.
It's actually not as bad as you'd think. You basically use the room as a place to sleep, the rest of the time you were in the hostel you'd just hang around the common areas.
It's definitely not for everyone. If you're more introverted and need your alone time it would be horrible.
If you're on a normal rhythm, it's night when you go to sleep and the window doesn't add much. If you do night shifts, having no windows in the day is down right merciful.
More to the point, musty and moldy is bad for your health.
Quite a lot of people are stuck with "Accept this crap situation, go to some other worse option or kill myself."
Plenty of cultures believe in an afterlife and/or that your actions impact on the reputation of your family or both. Suicide is often deemed shameful, it is a black mark on the family and you won't get into heaven or similar.
Thus, many people feel suicide is not really an option, leaving them with this crap or some worse option.
It's not much of a choice.
Americans are used to plywood or even paper board wrapped big houses.
I don't think there is a hard limit as to what humans will endure to survive or to make money to send home. Oddly, the question falls to "how low can I go to keep my life" instead of "how high can rise above my current situation."
Where the fuck are people who stand up and say, "we are humans, not rats, and we refuse to live like rats."
Some are in re-education camps, some in prison, some live on in a fashion as their organs were donated to more conformist subjects.
for example : https://www.dailymail.co.uk/news/article-4585230/Shocking-pi...
i don't think the keyword is "willing", more like "forced"/"have no choice"