Earlier quoted context omitted.
I like fishes. Fishes are healthy and main source of Omega-3 fatty acid for many. https://en.m.wikipedia.org/wiki/Omega-3_fatty_acid Be aware of pharma propaganda that for sure support any narrations that would make benefit for them, like making any kind of natural sources good for humans as threat, like sunshine or.. Fishes?
Catching your own fish, and eating that, is fine. Even if everyone who could do that, caught the fish they intended to eat, the oceans would be fine. It's the massive industrial trawlers that scoop up entire ecosystems that we need to stop.
Companies usually offer products that are much cheaper to make than individuals would make individually. Which mean lower source consumption.
True question is balance between quality and quantity. But economically it is broken when fiat money does not store value and governments decided to make own citizens to live on debts.