You guys could be true, I'm just theorizing here.
Albino ferrets don't suffer Waardy even though they are lighter in color then a Panda. Pandas are Waardy even though their base color can vary and they can have other mixes in them like the mitt gene. Color genetics can be so complicated. Such as why some white dogs suffer no health problems and others that are pied would suffer health problems. It all depends on what is happening on the inside, not so much on the outside.
However, like I said, all theories here.