This might be true if you consider being holed up with your family for the entirety of winter as "free time." Also, these studies always neglect the amount of random work that needed to be done before technology (e.g. fetching water from a well, chopping firewood, weaving baskets, etc).
Unless "centuries ago" means several centuries, in which case maybe it's murkier, the pre-industrial world was different. IIRC hours worked increased in the pre-industrial build-up to the revolution -- perhaps because there was more to buy, and people adjusted to try to buy things, rather than stopping when they had enough to eat.
That is a trip straight to the Middle Ages. Look at the following videos.
https://www.youtube.com/watch?v=UZ7WHKU_UoY
https://www.youtube.com/watch?v=Men6iwpLjno
Eastern Europe has some really bad places. IDK if USA is worse, but it would have to try.
Their condition doesn't really depend on the poverty level of the country they live in, but other factors such as cultural and integration issues, not always caused by them.
In short, not a really good example of poverty.
I would argue that multigenerational poverty in contemporary West has always something to do with cultural and integration issues. Plenty of refugees who came with a small bags of personal items have built middle class lives in a generation, even though they were foreign, did not know the language and faced crude racism from primitives.