Well, it's very early in the game to say what's causing the decline in sockeye. It's a classic case, in the sense that there are many, many factors. As for whether it could be sea lice or not, what's the evidence? That's what any biologist wants to say: what is the evidence? If it's a hypothesis, fine, it's a hypothesis. We already have two hypotheses: one is that it couldn't be and the other is that it could be.
Actually, that's probably not a particularly difficult thing to test. If you want to make decisions that are based on science, then who cares what people's opinions are? This is testable.