Maybe read some of the research on the Cowichan, its the best studied of the SoG rivers. There is tons of it essentially showing the survival of the chinook hatchery smolts is so low vs the naturally spawned ones that they estimate each pair taken for the hatchery produces no more returning fish than if they were left to spawn on their own despite the huge costs associated with artificially spawning them and tank raising their progeny. The evidence on the Cowichan recent success is pretty clear that it is due to excellent rehabilitative work and much better management of water flows. The run was dying with the hatchery before those initiatives.
There are mountains of evidence of the issues with hatcheries from genetic issues (signficant genetic variations start to occur after 1 generation). Your simple minded belief that pumping out more franken smolts means more fish has not been born out after 40 years of the hatchery programs from here to northern california. The early success of hatcheries on the Columbia was a particularly cruel phenomena, as it led to the SEP and large scale industrial hatcheries, which at the time most were probably not necessary. The more damaging aspect was the erroneous belief that our artificial smolt factories could replace the natural spawning processes. This helped allow the rape of watersheds for logging and other developments, because we can always just produce more smolts right? . Well it hasn't worked out that way, the ecosystem has adapted, and now its a big surprise that after multiple generations, the inbred, tank raised, overfed hatchery smolt survival rates have plummeted due to a variety of factors as we pumped out more and more of them.
A system like the Cowichan, that is well studied, has returns above the targeted escapement would be an excellent one to scale back the hatchery production gradually with the goal of returning it to a natural state. It can serve as a model for how rivers and the ecosystem surrounding it can be rehabilitated. realistically that wont happen.
Are hatcheries SOOO bad. Well yes, they are doing substantial damage particularly to wild stocks that is well documented. And no, as the damage we did necessitated some of them being built, many small community based enhancement projects that do not operate on an industrial scale have been helpful. Some river systems have no hope of ever being rehabilitated as they have been damaged beyond repair, your beloved hatcheries will never be able to come off them so don't worry, they aren't going away. Even on systems where they aren't doing any good they aren't going to go away, politically its much easier to just keep them running regardless if they are helpful or not, than to explain the science behind why they are trying to phase them out. Imagine trying to explain that science to thousands and thousands (millions) of people with little scientific of ecological background. For the vast majority of voters it needs to fit into no more than 15 seconds of sound bite or a page of text. So again, don't let your panties get too knotted up about my statements of factory smolt production being reduced anytime soon. Besides, we need to keep spending $millions feeding all the SoG seals with these nice fat dumb smolts they have learned to survive on! Cut off the easy smolt meals and the seal population could crash.