I'm not going to further engage in the debate as to whether or not hunter numbers are in decline, the info is out there, it's all documented, if you choose to not believe it, then it is what it is, but I do have a few comments.
First, even though I didn't create a thread about it, last year I actually did return to a place where I had been 2 years previous, and spent 7 days little more than 3 miles from the trailhead, and never saw a soul. After about a mile, I didn't even see any human tracks. Anecdotal and not representative of the whole I know...but I like irony.
As for government protecting hunters for years to come, the problem with your theory is that game management is left to the states, so the federal mechanism you reference is not in play. Further I would point out that CA lost mountain lion hunting almost 30 years ago, and lost fur trapping yesterday. New Jersey bear hunters suffered a big blow last year, and other bear hunters around the country are under siege. Coyote hunters, and predator callers in general are also under attack. I get fairly regular updates from the New Mexico Trappers Assn about all the legal challenges they are forced to answer.
You are right, we probably aren't going to lose all of hunting in the next little bit, but those who would take it from us are well funded, passionate, active, and patient. They are playing the long game, and incrementally chipping away at our opportunity. If we let them build momentum unanswered, it's on us, and nobody else.