I still think the idea should be discussed and maybe g20 nations come up with some agreements.
Hopefully things like lab grown fish improve and maybe we can move people away from the real thing.
I keep telling my kids they are lucky anytime we get the treat of having some fish as in their future it may not be something available to the common person.
It still means deforestation, biodiversity loss, soil degradation, poisoning the ecosystem with pesti/herbicides and fertilizers on land (with the associated runoff into the waterways) and a lot of organic waste on the water (each salmon farm in scotland produces as much organic waste equivalent to a town of between 10 and 20,000 people each year).
Not all commercial fishing is bad.
So, we may as well save the fish.