The rich, everywhere in the world, will continue to seek wild-caught though. (While they publicly rail against the poor eating wild-caught. Such is how the wheels turn.).
It’s bad for the salmon (in terms of animal welfare) and it’s wrecking the local ecosystems. It’s not any sort of panacea.
We need to stop destroying ocean ecosystems, not just shift the damage around. Overfishing of wild stock, habitat destruction through bottom-trawling and intensive fish farming all need to be properly looked at.
You criticise, yet don't provide any suitable recommendations or alternatives.
People like to eat fish and have done so since the beginning of our species.
It may be in the future that fishing joins that list.
Abolition is the only alternative to immoral and unethical actions, but in terms of nutrition, there are plenty of ways to get the same nutrients, and ways to use seaweed to replicate some of the flavors.