I think because of German uboats hunting in the Atlantic. They were attacking so close to the US coast there were cases where ships could be seen exploding and sinking from Manhattan at night.
It was the German uboats sinking US ships that was a factor in them joining WW1.
The doctors at the hospital where this happened were also doing autopsies and would often go directly from an autopsie to the delivery ward without washing their hands.
The midwives did not perform autopsies.
It was not that the midwives' hands were especially clean, it was that the Dr's hands were very contaminated.
You would get some niche subs were there was some decent discussion but once one passed about 100K subscribers there would be a noticeable downward spiral.
First you would have to assume or prove that chestnuts have sentience. (the ability to experience feelings and sensations)
Next you would have to assume or prove that chestnuts have potential. (The inherent ability or capacity for growth, development, or future success. )
Then you would have to assume or prove that chestnuts have agency. (the capacity of individuals to have the power and resources to fulfill their potential.)
Then you would have to find a group of chestnuts that have all of the above but doing nothing to reach their potential. While also ensuring that there are no impediments in their environment or upbringing that are constraining them or holding them back.
Then you could, credibly, accuse that particular group of chestnuts of being lazy.
The yanks were sending supplies to the UK. Without it the brits would have run out of food, oil and ammo.
It was called Lend Lease