Feeder fish live in a crowded environment only to be eaten alive. The goldfish and minnows that die like this are just to the misfortune that they are cheap and not very colorful.
I would not be able to handle my favorite fish do the same. However, if they became easier to breed and cheaper then today's feeders...
In the end, everything we do is simple: bussiness. I'm sure that with today's technology, we can transform a feeder goldfish into a top specimen, but that's not worth the cost. Ethics and morales keep us in check; good thing, they are usually right.
My ethics tell me not to grill my pet. I guess his don't.
150 gallon tank. Saltwater. Live rock. Queen Angel.
& 65 gallon tank. Freshwater. Moderately planted. Rainbowfish.
& 35 gallon. Nursury. QT. Hospital. Etc...