yeah, there's a lot of debate on it. at the end of the day one person reducing consumption makes no difference, only lots of people which is hard to coordinate
i think it would be wiser to force farming and fishery companies to stop making ecologically damaging decisions but that is also hard to do 🫠
from a purely selfish standpoint maybe it's better to enjoy fish while we still can, because there might not be any fish someday no matter what we (as individuals) do...