Thanksfor the very interesting thread OP!
Some examples of a lack of understanding of history though. Schools should be teaching about ordinary lives not kings and queens.
Life before the industrial revolution really wasn't that bad.
Our seas and rivers were full of fish (no permits required!) So it was a standard diet to eat lots of fish unless you lived far inland. We mostly have great agricultural land so ordinary people kept animals who provided much more nutritious meat than you get in Tesco today. With fresh eggs, home made dairy, fruit from the fields, preserves for winter it could be a diet to aspire to today!
A person then would have been hairier, greyer, more tanned, more wrinkled, fitter than today.
Their hands and feet would have been much more calloused.
Constant pregnancy is a myth. Age of marriage was much higher than after the industrial revolution. Breastfeeding til 4 was common and women understood natural birth control better.
It was when formula was invented that small gaps between pregnancies became more common.
People also used makeshift condoms.
Official marriage also wasn't a thing amongst the commoners. There was no need as they had no assets.
As for drinking water, alcohol was safer but drinks had less alcohol in them than today. The discovery of water borne diseases such as cholera was revolutionary but took some convincing!