You can’t verify your food intake sources 100% of the time, same goes for plant-based diets. There are millions of products which are derivatives of fish sources, like fish sauces and gelatin. Unless you live off the grid and catch all your own food and abstain from all commercial products, you will eventually consume non-sustainable fish products or byproducts. All that to say, it’s easier to remove fish from one’s diet entirely as most people aren’t going to be able to live in your rugged, off grid sustainable food environment.

And for bias, Plant based food sources have their problems too. But there is a severe drop in ecological destruction caused by plant-based agriculture compared to animal-based agriculture. I’d rather take my chances with plants and at least attempt to reduce my harm in a way that is cost friendly for everyone (have you seen the cost of sustainable fish and animal products? A 20lb bag of beans costs like $15)

I hope people who consume fish see the errors of their way. There are alternative calorie sources for fish that come from plants that will eliminate/reduce these bycatch problems. Unless of course you fish eaters want the oceans to be depleted of mammals and fish…. But you tell me. Actions speak louder than words.