I have definitely read somewhere, but at this point don't know where, that there was/possibly still is, a practice of pulling the
down from a goose's breast at a certain time of the year and it was considered a "sustainable harvest" (and they definitely didn't leave the bird cold and "nekid").
1. I suppose one could consider it more humane than killing the goose for their down.
2. Our Muscovy ducks pull their own down feathers to "feather their nest". In fact it's a key message to me that they're are a day or two from hard brood when I see down left in a favorite nesting place.
So I would have to read the article myself - was it a certain moon phase relating to the season in a geographical place? I certainly doubt that describing it as "because of the moon phase" is likely - more that the moon phase corresponded to an appropriate time in an era when few people owned a calendar. That said, considering that not many years ago, battery cages for
chickens were completely legal - a practice I personally can't abide by - there is not
enough info here for me to say how reasonable this concept is. Humans do have a history of doing incredibly unkind things to both animals and other humans.
However a few years ago, our Gander seemed to be having a big problem getting a tie with our bigger goose, and following some advice, I plucked both their butts a little and they both survived and didn't appear the worse for wear nor treated me as if I'd hurt them badly.