Probably because the fish doesn't have bacteria in it like salmonella and e.coli so we can eat it just fine without getting sick. Also, there's a big difference in the digestive tracts of dogs and humans.I always had my doubts about the delay because the digestive tract digests different nutrients at different times from the stomach to the intestines and so on. One example would be eating sushi and rice -- if the case about waiting for hours was true, then we would not be able to eat raw fish and rice together=)
I would love to hear some more input.
It doesn't have anything to do with dumbing down to any diet.I still think the argument not to feed the two together is a valid one. I honestly don't understand why one would want to dumb down a perfectly good raw diet with junk food anyway. It seems to be a large step backwards.