Not at all. I’d guess most in river sports closures for anadromous fish couldn’t statistically be shown to increase numbers. With all the nets and predators in the salt, that is the primary impact and as was stated earlier, this particular Chinook is doomed by changing climate and habitat alterations.
The only reason sport fishermen lose fisheries so frequently is because they can easily curtail us without serious push back. All the other impacts like commercial fishing, development, are significant engines of economy with powerful lobbies, so meaningful changes to their activities are far more difficult achieve.
You can look at society as a whole and find countless examples of changes meant to do good but will ultimately have little effect while the huge capitalistic impacts, the elephant in the room, get a slap on the wrist at worst and any changes to their activities will clearly have little impact. Just start paying attention and you will see it everywhere. It is so easy to address the small impacts and ignore the big impacts, it is the path of the least resistance, it is why most problems continue to get worse.
The whole “environmentalism starts at home”, and “you do whatever you can to help” type of messages that began at the start of the environmental movement were actually pushed by large powerful companies that stood to lose. For example, should we recycle cheap plastic? Or should we make a law that forces the companies making profits off cheap plastic related products find another type of material for their product? I know it sounds cynical, but we the people, are continuously being burdened with the job to do good by the world, while companies, capitalists and billionaires are being made by doing the opposite. It makes me sick how often this happens and the solution is to get money out of politics, but we already all knew that…