Depends on preparation, like anything else. You could eat an egg raw or burnt to a crisp and it would be a horrible experience, but if you have a recipe where it works well on its own or have experience with seasoning and combining it with other ingredients it works wonderfully as a meal.

Fish is similar, although I agree that some preparations are more appetizing than others to most people. You'll probably have more people clamoring for sushi or fish 'n chips (deep fried prep) rather than baked in an oven or grilled in a pan.

Also, some fish just are not worth eating, for sure.