Has little, or nothing, to do with removing the taste. Besides, a swan doesn't taste like a duck. It's about curing the meat, driving the cure completely through the cut of meat to preserve it. Curing the meat will change it's flavor. After curing it may even have a stronger duck flavor (to use your reference) 4 days would have easily been enough time to cure these breasts. The breasts are pretty hard. I hope it's not too salty.It takes 6 days to get the duck taste out of a swan? I've never had swan so I'm interested in how this plays out.
For the life of me I don't know why you don't like goose I think it tastes like beef.
Not all geese tastes like beef. I love geese taken from agricultural areas, corn fields like where I came from. Geese from around Evanston WY are pretty gamey.