Hello Ulissers!
I believe that this concept started from a time when we still have obsolete and primitive tools as well as vessels to make a living at sea. Back then we had to find ways to get a good catch and at the same time to survive the rough sea. This kind of thought does not exist solely in fishing industry but every other fields where we once had to struggle with the harsh nature to earn our living. It became an obsess to continuously modernize our equipments and catching methods and maximize our profit, to “win” or to outweigh the difficulties we have to face in the ocean that we forget there are a whole other ecology existing at the sea. By trying too hard to triumph the hardship, we are destroying our own nurturer - the ocean and we will lose it all - our food, our breath and our ecology. And once the hardship is over, the efficiency increases, we tend to take more just because we can.
This reminds me of the Jevons paradox – the breakthrough of technologies to improve efficiency and effectiveness will lead to an increase in consumption. I believe that the problem lies not in the fishing or getting food from the ocean, the problem is that we can't keep this relationship healthy and balance and we cannot draw a line to stop ourselves from killing the ecologies, especially when our population is growing exponentially.
I watched the Seaspiracy and I don't like the narrative, but in the end, it highlights many dark issues of abusive commercial fishing. However, I believe that it is the way we do it, the practices we apply, not the fishing itself. The same thing applies to plastic problem or agriculture or cottons and textiles. We need food to live, we need cotton to make clothes, we need plastics to make container and protective packaging to prevent spoilage, they are our basic needs. Food production, cotton production or plastics are not evil by themselves, some are useful and necessary even, but the way we grow our food, the way we destroy forests and soils to make our cotton and the way we use and dispose of plastics are the problem. If we don't learn and know better in adjusting our need in respect of our ecology, we will also find way to destroy our environment by alternative ways of living (the emerging of plant-based diet and biobased resources and biodegradable materials, if sustainable practices are not well considered, could also lead to the collapse of the ecology due to high demand).
I believe that the best solution to our environmental problems, overfishing or plastics, are not to boycott anything or totally eliminate anything, but to learn to recognize which practices are acceptable and which practices are not, to learn to live within our ecological boundaries by conscious consumption (know when and how much is enough) and increase our capability to monitor and prevent bad practices at sea. I’d say a good monitor system, e.g. wireless cameras at sea floor combined with radar/radio information, at hot spots for overfishing and trawling should be able to help (just a suggestion, forgive me for such oversimplication :D). Good legal measurements should be studied and implemented to encourage good practices also. And appreciate the efforts of many teams out there and give them the support they need is a good starting point, since that’s what lacks from Seaspiracy – the team is undermining the effort of many organizations in protecting the sea.