"Fish contain vital nutrients including omega-3 fatty acids, protein, vitamins, and minerals such as iron. These nutrients are essential..."
This is a quote from a website and it's the typical health advice you get. The words 'vital' and 'essential' stick out and it makes me wonder how humans survived before we developed the tools to catch fish.
If you look at the tools nature has given us it's very clear that they are not really the best for catching fish. Just go into a river (humans and other apes aren't really water dwellers) and try catching a fish with your bare hands or even better with your teeth.
How then can nutrients derived from fish be vital or essential? It makes no sense.