A fish, or the ecosystem, does not care how death occurs. Dead fish don't spawn.

There are ways to ensure that, for example, the SRKW get first crack at the fish they need to survive while still allowing salmon fishing.

What we do is compromise. We are willing to accept some mortality as a cost of doing business (C&R wild trout is a great example). But, when we "accept" that cost and the fish still decline then the cost is too high. Until the wild salmon runs show significant increases, the SRKW show significant increase in numbers and body condition we are killing too much of the ecosystem.