I read that original report at the time and thought it was utter bollocks.
I had trouble with my latch and ended up pumping exclusively for my dd, so I've a fairly good understanding of what it means to pump 8oz of breast milk and how much a newborn takes in milk (plus I did loads of research about it to ensure dd wss getting enough).
I tell you this: I cannot see how any biological female can pump 8oz in any reasonable length of time prior to her milk coming in after birth. Indeed, colostrum feeding is very small volume feed.
So if a pregnant woman would struggle to achieve this without already feeding a infant, then I doubt a biological male could.
Again, when my milk came in, I found expressing 8oz of milk took over an hour and that's full stream, hospital grade pump, and I was unusual in this regard. Every other woman I spoke to found it took them longer. So we would be talking about a TW daily pumping for hours to get a total of 8oz. And I just can't see that. The original report stated how long they pumped for a day, and it was laughably low.
Again, the average intake for a newborn is around 750ml a day with a low at about 570ml. This is, at best, twice the amount of this supposed pre-birth pump. Remember, there's no hormonal event in this case to trigger greater milk production.
The whole thing is rubbish. It's fake news.