I think that the concern is more about consumers and risk aversions. Fish, particularly anything with "fishy" taste, is looked down upon in some cultures. It's

I think that the concern is more about consumers and risk aversions. Fish, particularly anything with "fishy" taste, is looked down upon in some cultures. It's also not really cheaper than other kinds of meat, so you kind of get the worst of both "a lot of people have a dislike of fish" and "it's expensive".