Interesting article. It seems to be saying that wild salmon are pink because of a pigment in their diet, but farmed salmon are only pink because of a pigment in their diet.
Indeed. Farmed ones aren't given the same diet. I suspect it's not as healthy for them either, but it does well enough for industrial purposes. Think of cattle feed v grass, etc
But no, it's not "interesting" how your kid doesn't like it. It doesn't mean anything about the health about the product. Does your kid like candy?